Sludge extrusion dewatering testing machine and using method thereof

Abstract

The invention provides a sludge extrusion dewatering testing machine which is directly used for simulating sludge dewatering of a plate-and-frame filter press. Compared with the applicability of various filter cloth to different sludge, a result is obvious; compared with situations of different dosing conditioning technologies to performance improvement of the sludge dewatering, a test is quick and convenient, clear in result, small in labor capacity and low in cost; an influence on properties of different batches of sludge is small; influence factors in the test are controllable; the test is simpler and quicker; and the test times within the same time are increased greatly. The testing machine comprises a rack, wherein a landing leg is mounted on the lower end face of a bottom plate of the rack. The testing machine is characterized in that a sludge cup and an extrusion plate are arranged in a cavity between an upper plate and the bottom plate of the rack; the bottom of the sludge cup is hollow; filter cloth is mounted at the bottom of the sludge cup in a covering manner, and supported to a chassis; micropores are uniformly distributed in the chassis; an external ring part of the chassis is mounted in annular mounting grooves of a bracket; and quick connecting flanges are fastened and connected with the bottom end face of the sludge cup and the top end face of the bracket.

Description

technical field [0001] The invention relates to the technical field of a sludge dehydration tester, in particular to a sludge extrusion dehydration tester, and also provides a method for using the sludge extrusion dehydration tester. Background technique [0002] Most of the sludge produced by my country's sewage treatment plants has not been properly treated, and the random accumulation of sludge and the pollution and re-pollution problems caused by it have been highlighted, and have aroused the attention of the society and the country. In order to achieve the reduction, stabilization, harmless and comprehensive utilization of sludge, and achieve the disposal goals of energy saving, emission reduction and development of circular economy, sludge dehydration is the key to sludge treatment and disposal, and the sludge depth of plate and frame filter press Dehydration is more and more widely used in sewage treatment plant sludge disposal engineering projects. The screening...

AI Technical Summary

Problems solved by technology

However, practice has repeatedly proved that these two indicators have certain limitations and are not suitable for sludge dewatering in plate and frame filter presses.

The sludge specific resistance test uses a medium-speed qualitative filter paper, whose pore size is much smaller than that of the sludge dewatering filter cloth; and the capillary water absorption time measures the extravasation speed of free water in the sludge colloid, which is suitable for belt filter presses and centrifuges. However, the plate and frame filter press sludge dehydration needs to remove sludge capillary water, even combined water and adsorbed water, so the index of sludge capillary water absorption time is not applicable

[0004] For this reason, the existing sludge dehydration testing machine usually selects a small plate and frame filter press as the testing machine, so as to obtain the screening of different sludge for sludge conditioning agents and filter cloths, but in the test process, the small plate and frame The filter press is greatly affected by different batches of sludge, there are many influencing factors in the test, the calculation of the data after the test is complicated, the time of a single test is long, and the labor load is large and the cost is high

Images