A device for making sludge solidification test samples

Abstract

The invention relates to a sample preparation device for sludge solidification test, which belongs to the technical field of environmental geotechnical engineering. The sludge solidification test sample preparation device is composed of a storage system, a sample preparation system and an intelligent control rack system. A rubber bag is installed in the piston cavity, and a controllable feeding and discharging port is set on the rubber bag to ensure that there is no water evaporation and odor permeating during the sample preparation process; the method of vacuum pumping and piston extrusion, Ensure that the initial raw materials are uniform and air-free, and the sample preparation is rapid; the used sample injection gun head combined with the computer-controlled power compression piston and the bearing table equipped with sensors ensure that the solidified sludge during the sample preparation process is densely filled with the mold ring knife. The production device effectively solves the problems that the sample preparation requires a lot of materials, takes a long time, the sample is easily disturbed, easy to form holes and cannot guarantee the identity of the sample, the sample is produced slowly, the production process has a strong smell, and the sample reproducibility is low.

Description

technical field [0001] The invention relates to a sample preparation device for sludge solidification test, which belongs to the technical field of environmental geotechnical engineering. Background technique [0002] With the continuous improvement of urban sewage treatment rate and treatment capacity, the problem of municipal sludge treatment and disposal is becoming more and more serious. Sludge sanitary landfill is still the most commonly used method for sludge treatment in my country due to its advantages of low investment, large capacity, and fast treatment. However, the moisture content of the sludge dehydrated by the sewage treatment plant is still as high as 75%, which cannot meet the strength requirements for direct landfill disposal, and the sludge must be solidified. [0003] Due to the characteristics of high water content and high organic matter, the sludge is jelly-like, fluid and viscoplastic. After being stirred with the curing agent, the fluidity is weaken...

AI Technical Summary

Problems solved by technology

However, the moisture content of the sludge after dehydration treatment in the sewage treatment plant is still as high as 75%, which cannot meet the strength requirements for direct landfill disposal, and the sludge must be solidified.

[0003] Due to the characteristics of high water content and high organic matter, the sludge is jelly-like, fluid and viscoplastic. After being stirred with the curing agent, the fluidity is weakened and the viscoplasticity is enhanced at the initial stage of curing. Method sample preparation

[0004] At present, there is no special solidified sludge sample preparation device, and related methods and devices of geotechnical tests can be used to prepare solidified sludge samples. There are two main methods: (1) Cutting method: after the sludge is solidified in a large container, Then the ring knife is jacked into the solidified body to cut the sample. This method is simple and easy, and the sample preparation is fast, but it uses a lot of materials and wastes a lot. The sampling process disturbs the sample greatly and destroys the structure of the sample after curing; (2 ) Mold method: Pour the sludge mixed with curing agent into the mold for curing and setting, and then take it out after a certain curing time. When the stirred mud is poured into the mold, it is easy to mix air bubbles and it is not easy to discharge. The difference between the samples is large, and the identity of the samples cannot be guaranteed.

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