Intermittent electro-osmotic belt squeeze sludge dewatering apparatus

Abstract

The invention discloses an intermittent electro-osmotic belt squeeze sludge dewatering apparatus. The apparatus comprises a power supply, an air compressor and a dewatering unit, wherein the dewatering unit is a main component, and includes a frame, upper electrode plates, a lower electrode, driving shafts, airbags, an airbag supporting seat, filter belts and a water tank. The filter belts moves around the frame with the driving shafts as power and the frame as a support. The upper electrode plates and the lower electrode plate are respectively connected with the positive electrode and the negative electrode of the direct current power supply, a space between the upper electrode plates and the lower electrode plates is a dewatering zone and enables water molecules in the sludge to flow tothe lower electrode plate with a negative potential, and the air compressor controls the upper electrode plates to squeeze the sludge through the airbags, so the squeeze dewatering efficiency is greatly reduced, thereby the sludge reduction is obvious, and produced high-dryness sludge cakes facilitate later resource utilization.

Description

technical field

[0001] The invention relates to a sludge dewatering device, in particular to an intermittent electroosmosis belt press sludge dewatering equipment. Background technique

[0002] With the strengthening of environmental protection in my country, the amount of sludge produced by domestic sewage treatment plants in China has increased sharply. At present, the moisture content of sludge after mechanical dehydration in sewage treatment plants can only reach 80%. However, according to the current national standards, sludge from sewage treatment plants can only be put into domestic waste landfill or planted after treatment with a moisture content of less than 60%. In order to achieve this standard further deep dehydration must be carried out.

[0003] At present, sewage treatment plants use plate and frame filter presses, centrifugal dehydrators or belt filter presses to process sludge through physical methods such as extrusion or centrifugation. The sludge treated...

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