Belt type filter pressing device for sludge and working method thereof

Abstract

The invention provides a belt type filter pressing device for sludge and a working method thereof. The belt type filter pressing device for sludge comprises a flocculation area, a gravity settling area of the sludge and a sludge squeezing and extrusion area which are connected in sequence, wherein the sludge gravity-settling area is provided with a pre-pressing assembly, filter cloth and a scraping plate assembly, and the pre-pressing assembly is arranged above the filter cloth. According to the invention, the pre-pressing assembly is arranged in the gravity settling area; namely, through the repeated clamping action of clamping plates of the pre-pressing assembly, the flowing sludge with water can be clamped, so the water in the sludge with water flowing between the clamping plates is discharged at a higher speed under the action of the clamping action and is discharged along the filter cloth below, which enables the sludge treatment capacity of the gravity settling area to be improved through the clamping plates of the pre-pressing assembly and the water to be discharged at a higher speed; and thus, working efficiency is improved, the water content of the sludge discharged into the squeezing and extruding area of the subsequent station is reduced, and the water content of a finally obtained sludge cake is correspondingly reduced.

Description

technical field [0001] The invention relates to the field of main flow of sludge with water, in particular to a sludge belt filter press device capable of pre-pressing and rapidly dehydrating sludge in a gravity settling area and a working method thereof. Background technique [0002] Sludge belt filter press device is a very important device structure for processing sludge with water to obtain relatively dry mud cake. Its biggest feature is that it has a large processing capacity and can realize continuous and uninterrupted processing. Therefore, in It has very good application popularity in the industrial field. [0003] The belt filter press generally includes a flocculation station, a gravity settling station and a squeezing press station. The flocculation station is to quickly separate water and solid sludge by adding a flocculant to the watery sludge. At the working station, gravity is used to make the water free to filter and separate from the filter cloth, and then ...

AI Technical Summary

Problems solved by technology

[0004] However, it is found in practical applications that when the water content of the treated sludge is high, or when the flow rate of the sludge increases, the treatment efficiency and quality will decrease. The main reason is that the rate in the gravity settlement area cannot exceed Fast, when the flow rate of sludge in the gravity settling area is accelerated, the amount of filtration and separation of water will be reduced, so that it is easy to cause the water content of the obtained mud cake to increase and it is difficult to meet the requirements when it is discharged into the subsequent extrusion press station. That is, when the flow velocity in the gravity settling area becomes slow, the work efficiency will be significantly reduced, and the amount of sludge treated per unit time will be suppressed.

Furthermore, when the water content of the treated sludge is high, it will often cause the water content of the mud cake obtained in the subsequent pressing process to be difficult to meet the requirements.

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