Vertical double-layer filter cloth circulating filter pressing system and filter pressing method thereof

Abstract

The invention discloses a vertical double-layer filter cloth circulating filter pressing system and a filter pressing method thereof. The system comprises a rack, the rack is provided with a double-layer filter cloth circulating mechanism, a filter plate group, an upper pressing plate, a lower pressing plate, and a hydraulic cylinder; the upper pressing plate and the lower pressing plate, the hydraulic cylinder are connected with the rack, the upper end of the filter plate group is connected with the upper pressing plate, and the lower end is connected with the lower pressing plate; the hydraulic cylinder is connected with the upper pressing plate or the lower pressing plate, the hydraulic cylinder acts, the upper pressing plate and the lower pressing plate are close to each other, the double-layer filter cloth circulating mechanism comprises filter cloth I and filter cloth II which have respective circulating paths, the double-layer filter cloth is arranged on the filter plate group in an S shape, solid sludge with high water content is clamped between the double-layer filter cloth and conveyed to filter pressing plates, the multiple layers of filter pressing plates which are mutually overlapped are subjected to filter pressing in an involution extrusion mode, sludge is dewatered, and compared with a traditional vertical filter press, the vertical double-layer filter cloth circulating filter pressing system is ingenious in structural design and good in filter pressing effect.

Description

technical field [0001] The invention relates to the technical field of filter press equipment, in particular to a double-layer filter cloth circulation system of a vertical filter press used for non-flowing sludge treatment and a filter press method thereof. Background technique [0002] Filter press is a kind of mechanical solid-liquid separation equipment that uses a special filter medium to exert a certain pressure on the object to make the liquid dialysis out. It is widely used in the field of environmental protection and has become an important equipment for sewage sludge treatment. Existing filter presses mainly include: plate and frame filter presses, continuous belt filter presses. [0003] The first category, plate and frame filter press, separate filter press and horizontal filter press, the basic structure of the vertical plate and frame filter press is mainly composed of upper platen, lower platen, filter plate group, piston rod, hydraulic cylinder, Composed of ...

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Problems solved by technology

[0005] The disadvantages of this filter press method are: first, it is only suitable for the separation of sludge water with strong fluidity, that is, the treatment of sludge water with high water content, because a mud pump is required for grouting; at the same time, it needs to be periodically Maintenance of grouting pipelines; for horizontal plate and frame filter presses, the efficiency of the mud cake treatment process after water pressure is extremely low, and each layer of mud cake needs to be separated one by one;

[0007] The disadvantage of this structural method is that: compared with the extrusion method of pressing rollers, the pressure is relatively small, and the water content of the mud cake after treatment is high, and the water content of dehydrated sludge is usually 65%-80%.

[0008] For example, in the composting process, the sludge is generally required to have a low water content. If the sludge is incinerated and treated centrally, the high dehydration rate of the sludge can greatly reduce the heat energy consumption and reduce the cost of hazardous substances. Therefore, the mud cake with a higher water content Processing has very high processing costs

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