Electric-conductivity type sludge specific resistance measuring apparatus

Abstract

The invention provides an electric-conductivity type sludge specific resistance measuring apparatus. The electric-conductivity type sludge specific resistance measuring apparatus is mainly used for detecting a specific resistance of municipal sludge or industrial sludge. The electric-conductivity type sludge specific resistance measuring apparatus consists of a vacuum pump, a buffering bottle, anadjusting valve, a tee joint, a vacuum meter, a Buchner funnel, a movable joint, a flow guiding pipe, an exhaust opening, a measuring pipe, an electric conductivity array probe, a constant-voltage power supply, a resistor, a data acquisition card, a computer, an upper liquid drainage valve, a liquid storage barrel and a lower liquid drainage valve. According to an electric conductivity signal acquired by the electric conductivity array probe arranged on the measuring pipe in a suction filtering process, the apparatus determines a time for reaching the specific filtrate volume by analyzing a peak position in the signal, and has an automatic data recording function, so that the error made by manual recording can be avoided; and the lower end of the measuring pipe is provided with the upper liquid drainage valve, the liquid storage barrel and the lower liquid drainage valve, so that the measuring operation is simple, and the repeated disassembling of the apparatus in the measuring processcan be avoided. Therefore, the electric-conductivity type sludge specific resistance measuring apparatus has the characteristics of capability of automatically recording data and simplicity in operation.

Description

technical field [0001] The invention relates to a conductivity-type sludge specific resistance measuring device, in particular to an automatic detection device for determining sludge specific resistance based on a conductivity signal, and belongs to the technical field of measurement of sludge dewatering performance analysis. Background technique [0002] Sludge dewatering is the most important link before sludge disposal. It enables subsequent sludge disposal (such as incineration, composting and landfill) to proceed smoothly by reducing the moisture content of sludge or reducing the volume of sludge. The dewatering resistance of sludge is mainly composed of filter medium resistance and sludge (filter cake) resistance. The greater the sludge dewatering resistance, the worse the dewatering performance. At present, there are two main indicators to characterize the dewatering performance of sludge: capillary water absorption time and sludge specific resistance. [0003] The...

AI Technical Summary

Problems solved by technology

The traditional measurement method of sludge specific resistance mainly adopts the vacuum filtration method, but there are two main deficiencies: 1) The measurement process requires accurate timing and reading of the filtrate volume, and this process often takes a long time and is less affected by human records. Large; 2) The processing operation is cumbersome. For example, after each measurement, the device needs to be disassembled, and the filtrate in the measuring cylinder can be poured out before the next set of experiments can be performed.

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