Suspension filtering system convenient for sludge discharge

Abstract

The invention discloses a suspension filtration system convenient for sludge discharge. The suspension filtration system comprises a water filtering tank communicating with a raw water channel and a backwashing system communicating with the water filtering tank, wherein a lower water distribution crown plate and an upper filter plate in the water filtering tank divide the water filtering tank intoa lower water distribution area, a middle filter area and an upper clear water storage area, and the middle filter area is filled with a filter material; the water filtering tank is of a cylindricalstructure; the lower portion of the water filtering tank is of a frustum-shaped structure obliquely extending from the bottom of the cylindrical structure to the center line of the cylindrical structure; and the bottom wall of the water filtering tank is provided with a water inlet matched with a water supply pipe of the raw water channel and a water outlet matched with the backwashing system. Thesuspension filtration system has the advantages that structure is ingenious; water distribution is uniform; the problem that the thickness difference of the filter material is large due to non-uniform water distribution is effectively avoided, the thickness uniformity of the filter material is ensured, and filtering effect can be ensured; and sludge can be discharged while backwashing is performed, and silt at the bottom does not need to be specially cleaned, so time is saved, clean water is saved, and filtering efficiency is further improved.

Description

technical field [0001] The invention relates to the field of high turbidity sewage filtration, in particular to a suspension filtration system which is convenient for mud discharge. Background technique [0002] In the conventional filtration process, the water that needs to be filtered generally flows from the upper part of the filter tank to the lower part of the filter material, that is, forward filtration, and the density of the filter material used in it is higher than that of water, such as the currently widely used fast filter tank, V-shaped filter, etc. The following problems generally exist in the existing forward filtration method: firstly, in order to ensure the filtering effect, it is necessary to lay a thicker filter material, and when the water flow passes through the filter material, it will cause the loss of water head; secondly, a large amount of water is often consumed during backwashing. High-quality water source and power supply are seriously wasted; thi...

AI Technical Summary

Problems solved by technology

The following problems generally exist in the existing forward filtration method: firstly, in order to ensure the filtering effect, it is necessary to lay a thicker filter material, and when the water flow passes through the filter material, it will cause the loss of water head; secondly, a large amount of water is often consumed during backwashing. High-quality water source and power supply are seriously wasted; thirdly, if there is a large amount of algae in the water source to be treated, the algae will easily block the filter material, increase the number of backwashing times, further increase energy consumption, and waste water

[0004] 1) The filter body of this technical solution is a cuboid structure, the water inlet is located on one side of the filter body and the backwash pipe is located on the opposite side of the water inlet. Although the backwash system can backwash the filter material, the filter material on the filter material Silt and other debris are washed down, but due to the long filter body, the backwashed sediment is difficult to discharge from the backwash pipe, and a large amount of high-quality water is required to regularly clean the sludge at the bottom of the filter body, which not only wastes water, but also takes a long time , affecting the normal operation of the system

[0005] 2) Since the filter body is long and the water inlet is located on one side of its short side, the lateral thrust generated by the water flow at the water inlet pushes the filter material to move to the other side during the rising process of the water body, resulting in the filter material on the side of the water inlet The filter material is thinner and the other side is thicker, the thickness distribution of the filter material is extremely uneven, and the filtering effect is not uniform; and because the water inlet is located on one side of the filter body, the water distribution is uneven

[0006] 3) During the backwashing process, it is necessary to pay attention to the water level of the filter body in real time. Once the water level drops to the middle and lower part of the filter area, the smaller filter material will fall into the water distribution area below as the water level drops, causing the filter material to loss

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