SYSTEM FOR CONTROLLING THE CONCENTRATION OF A DETRIMENTAL SUBSTANCE IN A SEWER NETWORK

• Main Authors: WEISSENBERGER, JUERGEN, CORBEN, TIM, AESOEY, ANETTE
• Format: Patent
• Language: English; French
• Published: 26.04.2007
• Subjects: CHEMISTRY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to a system for controlling the concentration of a detrimental substance, in particular H2S, in a sewer network. The system comprises a monitoring device arranged at a monitoring location in the sewer network and at least one dosing controller arranged at a dosing location upstream the monitoring location. The monitoring device is arranged for providing a signal indicating a measured H2S concentration at the monitoring location and for transmitting a radio frequency signal carrying information about the H2S concentration. The dosing controller is arranged for receiving the radio frequency signal, deriving a concentration signal based on the radio frequency signal, calculating a dose of a preselected additive based on the derived concentration signal, and supplying a dosing signal to a dosing device, causing the dosing device to add the calculated dose at the dosing location. Advantageously, the calculating of a dose also takes into account critical process indicators acquired at the dosing location. A main controller is arranged to communicate with the at controllers, and various control tasks are distributed among the main controller and the dosing controllers. L'invention porte sur un système de surveillance de la concentration en substances nocives, et en particulier de H2S, dans un réseau d'égouts. Le système comporte un dispositif de mesure placé en un point adapté du réseau, et au moins un contrôleur de dosage placé en amont du dispositif de mesure, fournissant un signal indiquant la concentration en H2S en ce point, et transmettant un signal RF d'information sur la concentration. Le contrôleur: reçoit le signal RF, en tire la concentration, calcule la dose d'un additif présélectionné en fonction de la concentration, et transmet un signal de dosage à un dispositif de dosage qui distribue la dose calculée. Le calcul de la dose prendra de préférence en compte des indicateurs de processus critique situés sur le lieu de distribution de la dose. Un contrôleur principal communiquant avec les contrôleurs de dosage se répartit avec eux différentes tâches.