Manufacturing device for sludge solidification test samples

Abstract

The invention relates to a manufacturing device for sludge solidification test samples and belongs to the technical field of environmental geotechnics.The manufacturing device for the sludge solidification test samples is composed of a storage system, a sample manufacturing system and an intelligent control rack system.A rubber bag is arranged in a piston cavity, a controllable feed port and a controllable discharge port are formed in the rubber bag, and it is guaranteed that no water evaporation or odor diffusion exists in the sample manufacturing process.By means of the mode of vacuum pumping and piston extrusion, it is guaranteed that initial raw materials are uniform and free of air, and sample manufacturing is rapid.A sample injection gun head is combined with a power compression piston controlled by a computer and a bearing table with an inductor, and it is guaranteed that a die cutting ring is tightly and fully filled with solidified sludge in the sample manufacturing process.The problems that more sample manufacturing materials are needed, consumed time is long, the samples are easily disturbed, holes are easily formed, the identity of the samples cannot be guaranteed, sample manufacturing is slow, the smell is heavy in the manufacturing process, and the reproduction of the samples is low are effectively solved through the manufacturing device.

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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