Water-saving method for pretreatment in water treatment process

Abstract

The invention relates to a pretreatment water-saving method in a water treatment process, which is characterized in that: a precision filter, a raw water tank, a raw water pump, an active carbon filter filled with an active carbon filter material with iodine value greater than or equal to 1100mg / g, and an active carbon filter filled with an active carbon filter material with iodine value of 950-1000mg / g are sequentially connected in series by pipelines to form a pretreatment system; the pretreatment system is controlled by a PLC, after the pretreatment system receives a working instruction of the PLC, a raw water electromagnetic valve is opened, raw water is treated by a precision filter, silt and solid particles in water are removed, the raw water enters a raw water tank to be temporarily stored, the raw water is pressurized by a raw water pump and then injected into an activated carbon filter filled with an activated carbon filter material with the iodine value larger than or equal to 1100 mg / g, and the activated carbon filter material is filled with an activated carbon filter material with the iodine value larger than or equal to 1100 mg / g. Then the water enters an activated carbon filter filled with an activated carbon filter material with the iodine value of 950-1000 mg / g, and smells, flavors and organic matter in the water are removed. The system has the advantages that the flushing process of the pretreatment system is omitted, and the consumption of raw water is reduced, so that the aim of saving water is fulfilled.

Description

technical field [0001] The invention relates to a water-saving method for pretreatment in a water treatment process, and belongs to the technical field of water treatment. Background technique [0002] Now the direct drinking water industry is mainly based on the traditional water treatment process, which is composed of a pretreatment system, a membrane treatment system, an online sterilization system and a water supply and return system. The filtration of residual chlorine, colloid, organic matter and other impurities is mainly carried out in the pretreatment system. At present, the existing pretreatment systems in the direct drinking water treatment industry are: ① raw water pump, ② multi-media filter, ③ activated carbon filter It is composed of filter, its filtration accuracy is low, and the filter material is saturated quickly. At the same time, regular positive and negative flushing is required. If the flushing is not timely, it will cause the filter material to harden ...

AI Technical Summary

Problems solved by technology

Under normal working conditions, the filtration accuracy of the quartz sand filter is generally between 100-200 μm, and the highest is not more than 50 μm. Without adding coagulant, it cannot remove soluble solids in water, and can only filter particles with a certain particle size. Suspended solids have a filtering effect, and are limited by the dirt-holding capacity of the filter material. After continuous filtration for a period of time, it must be rinsed

Because the flushing water source is raw water in the conventional design, when the sediment content in the raw water is high, the flushing will not only fail to achieve the effect, but will accelerate the fouling of the filter material, which will easily cause saturation or compaction of the filter material, making the filter invalid. Directly pollute the subsequent treatment process, or even damage the control head

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