Spiral pulse gas-water composite backflushing system

Abstract

The invention discloses a spiral pulse gas-water composite backflushing system which includes a filter tank, gas-water mixing jet pipes are in circumference array arrangement in the filter tank, independent first and second pulse gas jet branch pipes and a backflushing water jet pipe are arranged in each gas-water mixing jet pipe, the out-jet direction of jet ports of the first pulse gas jet branch pipes are in clockwise arrangement according to the circumference array to form a positive spiral pulse gas-water mixing jet system, the out-jet direction of gas-water jet ports of the second pulse gas jet branch pipes are in anticlockwise arrangement according to the circumference array to form a negative spiral pulse gas-water mixing jet system, and the first and second pulse gas jet branch pipes are connected with a pulse gas source input device. A filter media in the filter tank can be stirred at a high speed by spiral pulse compound gas and water, the filter media can intensely collide and move in the filter tank, discharge of impurities in the filter media into water is accelerated, and the filter media can be quickly restored to the level before filtration.

Description

technical field [0001] The invention relates to the technical field of water purification plants, in particular to a spiral pulse air-water composite backwashing system. Background technique [0002] With the gradual implementation of rural drinking water safety projects, more and more township and village-level water purification plants are used. This type of water purification plant requires the use of rural surface raw water for treatment as much as possible, and the cost of water purification facilities is as reasonable as possible. Operation and maintenance The cost is low so that it is suitable for rural use. [0003] When surface raw water is used for purification treatment, the raw water pretreated in the sedimentation tank enters the filter tank for filtration. After filtering for a period of time, the filter medium in the filter tank needs to be backwashed to discharge the impurities mixed in the filter medium. The medium restores the excellent filtering ability. ...

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Problems solved by technology

[0003] When surface raw water is used for purification treatment, the raw water pretreated in the sedimentation tank enters the filter tank for filtration. After filtering for a period of time, the filter medium in the filter tank needs to be backwashed to discharge the impurities mixed in the filter medium. The medium restores the excellent filtering ability. The backwashing in the prior art generally uses a nozzle installed at the bottom of the filter tank to spray a large amount of water to wash and hold up the filter medium in the filter tank as a whole, so that the filter medium rolls in the filter tank. In order to discharge the impurities in the filter medium, but because there are many filter mediums and the existing quartz sand type filter medium has a large specificity, it takes a long time for the filter medium to roll and backwash in the filter tank, and it takes a lot of backwash water, which is wasteful. Filtered clean water is not conducive to saving water resources

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