Feedwater treatment and disinfection process by converting multipoint free chlorine into chloramine
A technology for water supply treatment and free chlorine, which is applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, sterilization/microdynamic water/sewage treatment, etc., to avoid violent fluctuations, high disinfection effect, and reduce disinfection The effect of by-product formation
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Embodiment 1
[0034] See figure 1 A kind of equipment for the feed water treatment and disinfection process that is used for multi-point free chlorine to be converted into chloramine as shown:
[0035] The sedimentation tank inlet channel 1 is connected to the sedimentation tank 2, and there is a sedimentation tank collection channel 4 at the rear end of the sedimentation tank, and the first chlorine injection point 3 is set at the sedimentation tank collection channel; the sedimentation tank 2 passes through the sedimentation tank outlet pipe 5 and filters Pool 6 is connected. The second chlorine injection point 7 is set on the pipeline at the water outlet place of the filter pond, and the third chlorine injection point 8 is set on the pipeline at the water inlet place before the pipeline enters the clear water pool 10; Ammonia nitrogen dosing point 9 is set on the pipeline between the chlorine injection point and the water inlet of the clean water pool; the clean water pool is connected ...
Embodiment 2
[0040] In this example, the effluent from the sedimentation tank of a waterworks plant is taken as the research object, and the influent flow rate of the water supply plant is 6100m 3 / h, COD of the effluent from the sedimentation tank Mn The value is 4.05mg / L, the ammonia nitrogen is 0.21mg / L, and the bromide ion is 160μg / L.
Embodiment 3
[0044] In this example, the effluent from the sedimentation tank of a waterworks plant is taken as the research object, and the influent flow rate of the water supply plant is 6400m 3 / h, COD of the effluent from the sedimentation tank Mn The value is 4.20mg / L, the ammonia nitrogen is 0.19mg / L, and the bromide ion is 160μg / L.
[0045] Apply the equipment of Example 1 to carry out the water supply treatment and disinfection process of converting free chlorine into chloramine at multiple points: the added chlorine is liquid chlorine gas, and the added ammonia nitrogen is liquid ammonia gas.
[0046] The liquid chlorine gas is added at the first chlorine injection point set at the catchment channel at the back end of the sedimentation tank of the water plant so that the content of the added chlorine in the treated water is 2mg / L, and the original flow from the sedimentation tank to the filter tank is used. There is a water distribution system to mix the treated water with chlori...
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