Patent FR-2941977-A1 (FR)
Title: Network for distributing water comprises first secondary network and second secondary network, a pipe for interconnecting the secondary networks and closed by a closing body, and a rinsing unit comprising e.g. unit for withdrawing water
Inventor: FABRE CHRISTIAN
IPC: C02F1/68
Filed: 2009-02-11
Abstract: The water distribution network (10) comprises a first secondary network (20) and a second secondary network (22), a pipe (24) for interconnecting the first and second secondary networks and closed by a closing body (26), which defines a first portion of pipe belonging to the first and second secondary network portion of pipe belonging to the second secondary network, and a rinsing unit (30). The rinsing unit comprises a unit for withdrawing water in the first portion of pipe, a unit for injecting a disinfectant product in withdrawn water, and a unit for reinjecting the withdrawn water. The water distribution network (10) comprises a first secondary network (20) and a second secondary network (22), a pipe (24) for interconnecting the first and second secondary networks and closed by a closing body (26), which defines a first portion of pipe belonging to the first and second secondary network portion of pipe belonging to the second secondary network, and a rinsing unit (30). The rinsing unit comprises a unit for withdrawing water in the first portion of pipe, a unit for injecting a disinfectant product in withdrawn water, and a unit for reinjecting the withdrawn water mixed with the disinfectant product in the second portion of pipe. The withdrawing unit comprises a power supply to be connected to the first portion of pipe, and an upstream analyzer of disinfectant product concentration laid on the feeding system, a turbine fed by the water flow flowing in the feeding circuit, and an element including a pressure sensor, turbidity sensor and a flowmeter. The turbine is intended to generate the electric energy for feeding rinsing unit. The injection unit is connected to a unit for generating disinfectant product, and to a reservoir of disinfectant product. The reinjection unit comprises a discharge circuit to be connected to the second portion of the flow and a downstream analyzer of disinfectant product concentration laid on the discharge circuit. A unit is arranged for transmitting the water to a monitoring center of the water distribution system. The geographic position of the rinsing unit and the data are measured by the analyzer. The analyzer is intended to be measured by a parameter including an amount of disinfectant product concentration in the pipe, the flow of water circulating in the pipe and the water pressure in the pipe. The monitoring center comprises a hydraulic model and a quality model, a unit for calculating a deviation between an estimated value of the disinfectant product concentration in the pipe, and a unit to trigger an alert if the difference is greater than a predetermined value. The estimated value is provided by the quality model and the concentration measured by the analyzer. The first secondary network has a pressure greater or lesser than the pressure of the second secondary network. The rinsing unit further comprises a pressure reducer, a pump and a solar panel, and is mounted on a vehicle. The disinfectant product is made of chlorine. Independent claims are included for: (1) a process for rinsing a network of distribution water; and (2) a movable rinsing unit.