Efficient and energy-saving method for backflushing filter media

Abstract

The invention relates to an efficient and energy-saving method for backflushing filter media. By the method, precipitation and filtering of sewage purification can be achieved in a system, size is reduced, high-quality water can be obtained, and the problems that water quality is poor in an existing precipitation system and high-turbidity sewage cannot be treated directly by a filter system are solved. Furthermore, the method has the advantages of high efficiency and economized land resources. In addition, since light granular media filter material is adopted, vibration energy or oscillation energy generated by an energy generator and clean water are utilized to flush floc heavier than water out from the filter material from top to bottom, and the floc accumulated in the filter material can be flushed. The vibration energy or oscillation energy is adopted to backflush the filter material from top to bottom mainly, so that on the one hand, the clean water to be consumed by backflushing the filter material can be economized greatly, on the other hand, no water is needed to be taken out of a device, energy saving is achieved, and water resources are economized.

Description

[0001] technical field [0002] The invention relates to a high-efficiency and energy-saving method for backwashing filter media. [0003] Background technique [0004] The existing sewage purification methods generally include two processes of sewage sedimentation and filtration, and two systems need to be installed to complete the sedimentation and filtration processes respectively, and installing two systems at the same time will result in a large footprint. In addition, the current water quality of the sedimentation system is poor, that is, the turbidity is high; and the filtration system cannot directly treat sewage with high turbidity, and it is impossible to directly treat sewage with high turbidity and obtain better water quality. The purpose of effluent, resulting in inefficiency. [0005] At present, when the filter system flushes the flocs in the filter material, it usually flushes the flocs heavier than water from the filter material from the bottom to the top,...

AI Technical Summary

Problems solved by technology

[0004] The existing sewage purification methods generally include two processes of sewage sedimentation and filtration. Two systems need to be installed to complete the sedimentation and filtration processes respectively. Installing two systems at the same time will result in a large footprint.

In addition, the current water quality of the sedimentation system is poor, that is, the turbidity is high; and the filtration system cannot directly treat sewage with high turbidity, and it is impossible to directly treat sewage with high turbidity and obtain better water quality. purpose of effluent, resulting in inefficiency

[0005] At present, when the filter system flushes the flocs in the filter material, it usually flushes the flocs heavier than water from the filter material from the bottom to the top, and takes them out of the filter system with the backwashing water. The amount of clean water required to consume accounts for about 10% of the total amount of clean water treated; it requires a large amount of clean water and high water pressure, which fails to achieve the purpose of saving energy and water

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