MULTI-SECTION CONTACT RESERVOIR FOR WATER OZONE TREATMENT (VERSIONS) Russian patent published in 2014 - IPC C02F1/00 

FIELD: process engineering.

SUBSTANCE: invention relates to water supply particularly to treatment of water from surface sources by ozone and can be used in municipal water supply decontamination systems. Contact reservoir comprises pressure compartment with water feed system and drain compartment with water discharge system. Besides, it comprises ozone-gas mix feed system, residual ozone destruction and bleed system, gas dispersing elements arranged at contact reservoir bottom and equipped with water flow swirlers composed by centrifugal nozzles. Inlets of the latter are communicated with water feed system to ensure a required water differential pressure at said nozzles. Outlet nozzles composed by circular slots are arranged above perforated surface of gas dispersing elements and in parallel therewith. Nozzle atomisers allow the wash-off by flat water jet of originating ozone-gas mix bubbles of reduced size and increased absorption of ozone by water. Systems to feed untreated water to drain compartment are composed by perforated pipes mounted atop the contact reservoir, level with water level and in parallel one with another, with their one end plugged. Open ends of said pipes are communicated with either pressure or drain compartment. At bottom, nearby dispersing elements as transverse perforated web with its chamber communicated with either pressure or drain compartment, nozzle inlets are communicated with pipes whereto water flows from pressure compartment. Note here that said gas dispersing elements are composed by usual discs arranged regularly in contact tank cross-section to make water passages and servicing sites. In compliance with first version (fig. 1) perforated pipe open end at tank top section is communicated with pressure compartment. Chamber above perforated web is communicated with drain compartment. This version ensures counterflow of water and ozone-gas mix. In compliance with second version (fig. 2), perforated pipe open ends at tank top section are communicated with drain compartment while chamber above perforated web communicates with contact tank pressure compartment. This version ensures cocurrent flows of water and ozone-gas mix. In compliance with both versions, inlets of centrifugal nozzles at gas dispersing elements are communicated with contact tank pressure compartment.

EFFECT: simplified design, lower costs, simple assembly and servicing.

2 cl, 2 dwg