FR2932685A1 - Device for continuous anti-legionella treatment for sanitary water circuit, comprises telemonitoring controller assuring traceability and regulation by biases of measure of water flow of circuit and hydrogen potential of circuit - Google Patents

Device for continuous anti-legionella treatment for sanitary water circuit, comprises telemonitoring controller assuring traceability and regulation by biases of measure of water flow of circuit and hydrogen potential of circuit Download PDF

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FR2932685A1
FR2932685A1 FR0803508A FR0803508A FR2932685A1 FR 2932685 A1 FR2932685 A1 FR 2932685A1 FR 0803508 A FR0803508 A FR 0803508A FR 0803508 A FR0803508 A FR 0803508A FR 2932685 A1 FR2932685 A1 FR 2932685A1
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sanitary
circuit
water circuit
sanitary water
traceability
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FR2932685B1 (en
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Jean Michel Storione
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/24—Apparatus using programmed or automatic operation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/16—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using chemical substances
    • A61L2/18—Liquid substances or solutions comprising solids or dissolved gases
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/02—Temperature
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/04—Oxidation reduction potential [ORP]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/06—Controlling or monitoring parameters in water treatment pH
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/40—Liquid flow rate
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

The device comprises a telemonitoring controller (1) assuring the traceability and the regulation by the biases of the measure of: the water flow of the circuit; the hydrogen potential (3) of the sanitary water circuit; redox value (4) of a check valve of the sanitary water circuit; the redox value (5) of a check-out valve of the sanitary water circuit; the check-out temperature (6) of the sanitary water circuit; the reflow temperature of the sanitary water circuit; the pressure of the sanitary water circuit; and the control of a measuring pump, which mixes chlorine in a container. The device comprises a telemonitoring controller (1) assuring the traceability and the regulation by the biases of the measure of: the water flow of the circuit; the hydrogen potential (3) of the sanitary water circuit; redox value (4) of a check valve of the sanitary water circuit; the redox value (5) of a check-out valve of the sanitary water circuit; the check-out temperature (6) of the sanitary water circuit; the reflow temperature of the sanitary water circuit; the pressure of the sanitary water circuit; and the control of a measuring pump, which mixes chlorine in a container and flows the mixture in the water circuit through an injection pipe. The controller manages the parameters of flow, pressure, temperature, hydrogen redox value and hydrogen redox potential, and the management of the injection system with its reactional container containing sodium hypochlorite at a chlorometric value of 36[deg] . The chlorine (less than 1 ppm) is injected in the water sanitary network through an injection pipe. Different sensors automatically provide analogous signals at 0-10V, 4-20 ma and pt1000. The analysis and management of measured value allows to automatically regulate the injection system, and to justify its phase of function in order to assure the traceability. An independent claim is included for a process for continuous anti-legionella treatment for sanitary water circuit.

Description

Indication du domaine technique de l'invention. Indication of the technical field of the invention.

La présente invention concerne la désinfection et la lutte contre la légionellose dans les équipements de production, de stockage, pour les réseaux de distributions hydrauliques sanitaires, par chloration continue et contrôle de la température, avec traçabilité permanente par système informatique. Indication de l'état de la technique antérieure faisant ressortir le problème posé Les solutions actuelles de traitement par chloration de 1 à 3 ppm, font appels soit à des logiques volumétriques avec non fonctionnement dans les périodes de non soutirage (nuit et week-end), ou par mesure de la quantité réelle de chlore libre actif par analyseur avec sonde ampérométrique dans une chambre à écoulement libre montée sur le circuit de bouclage ECS, cet équipement combinant un retard issu d'une logique de régulation à boucle ouverte entre la mesure et l'injection, ainsi que d'une fuite continue à l'égout de la chambre à écoulement libre générant une perte en eau chaude sanitaire avoisinant les 263 m3 par an. Un exposé de l'invention permettant la compréhension e la solution technique apporté au problème technique posé. The present invention relates to the disinfection and the fight against Legionnaire's disease in the equipment of production, storage, for the networks of sanitary hydraulic distribution, by continuous chlorination and control of the temperature, with permanent traceability by computer system. Indication of the state of the prior art highlighting the problem posed The current chlorination treatment solutions of 1 to 3 ppm, call for either volumetric logic with non-functioning in non-racking periods (night and weekend) or by measuring the actual amount of free active chlorine per analyzer with an amperometric probe in a free-flow chamber mounted on the DHW loopback circuit, this equipment combining a delay from an open-loop control logic between the measurement and injection, as well as a continuous leak in the sewer of the free-flowing chamber generating a loss in domestic hot water of around 263 m3 per year. A presentation of the invention for understanding the technical solution to the technical problem.

Le système installé sur le réseaux d'eau chaude sanitaire utilise une logique de régulation de type boucle fermée en faisant la synthèse du volume d'eau consommé par contrôle volumétrique de la distribution d'eau destinée à la production d'eau chaude sanitaire, ainsi que des valeurs réelles de chlore actif mesurées dans le réseau hydraulique sanitaire par la combinaison d'une sonde de mesure de pH située sur l'arrivée d'eau froide et de deux sondes de rédox positionnées respectivement en limite haute sur le départ d'eau chaude sanitaire, et en repère de consigne sur le circuit de bouclage ECS. Ce montage permet de maintenir précisément une valeur de 1 ppm de chlore actif dans toute l'installation ECS, qu'il y ait ou non soutirage d'eau. The system installed on the domestic hot water network uses a closed-loop control logic by synthesizing the volume of water consumed by volumetric control of the water supply for the production of domestic hot water, as well as that actual values of active chlorine measured in the sanitary water network by the combination of a pH measuring probe located on the inlet of cold water and two redox probes positioned respectively at the upper limit on the water outlet hot water, and set point on the DHW circulation circuit. This assembly makes it possible to precisely maintain a value of 1 ppm of active chlorine throughout the DHW installation, whether or not water is withdrawn.

L'équipement de traitement d'eau comprend un coffret contenant l'automate d'analyse et de régulation avec logique PID, avec affichage des valeurs de potentiel hydrogène, et de mesures redox, ainsi que les mesures des températurE et de pression des circuits départ et de retour de boucle ECS. The water treatment equipment includes a box containing the analysis and control automaton with PID logic, with display of the hydrogen potential values, and redox measurements, as well as measurements of the temperature and pressure of the flow circuits. and back ECS loop.

Une horloge interne permet la logique horodatée, tandis qu'un modem associé aux réseaux RTC ou GSM autorise le traitement des données à distance. L'automate dispose d'un protocole de communication ouvert (Mod/bus - J/bus) ainsi que d'un logiciel d'exploitation simple assurant le contrôle et la traçabilité de l'équipement par l'utilisateur et l'exploitant. An internal clock allows time-stamped logic, while a modem associated with PSTN or GSM networks allows remote data processing. The controller has an open communication protocol (Mod / bus - J / bus) as well as a simple operating software ensuring the control and traceability of the equipment by the user and the operator.

Le contrôle et la traçabilité s'effectuent par le biais du réseau informatique local, ou à distance par le modem de l'automate. Tous les paramètres contrôlés (débit, pression, température, chloration) sont archivés dans la mémoire de l'automate pour être traités sous forme de journaux ou d'alarmes.45 L'équipement permet notamment de visualiser et de quantifier les valeurs suivantes avec un principe calendaire. Control and traceability is done through the local computer network, or remotely via the controller's modem. All controlled parameters (flow, pressure, temperature, chlorination) are stored in the PLC memory to be processed as logs or alarms.45 The equipment allows the following values to be visualized and quantified with a calendar principle.

- Consommation d'eau chaude sanitaire (jour, nuit, semaine, mois etc.) - Valeur de chlore libre actif calculée (moyenne, haute et basse) 10 - Température départ et retour de boucle ECS - Pression du réseau hydraulique ECS - Alarme niveau bas de chloration réseau - Alarme niveau haut de chloration réseau - Alarme niveau moyen bac de mélange chloré 15 - Alarme niveau bas bac de mélange chloré - Alarme températures haute et basse départ ECS - Alarme températures haute et basse bouclage ECS - Alarme AT départ/retour ECS - Alarme manque d'eau 20 - Alarme mauvais réapprovisionnement bac mélange chloré - Consumption of domestic hot water (day, night, week, month, etc.) - Calculated free active chlorine value (average, high and low) 10 - DHW flow and return temperature - DHW hydraulic system pressure - Level alarm low chlorination network - Alarm high level of chlorination network - Alarm medium level chlorinated mixing tank 15 - Low level alarm chlorinated mixing tank - High and low temperature alarm DHW - High and low temperature alarm DHW circulation - Start / return AT alarm DHW - Alarm lack of water 20 - Alarm bad replenishment tank chlorine mixture

L'équipement nécessite une ligne téléphonique analogique. The equipment requires an analog telephone line.

Les alarmes peuvent être envoyées vers 5 directions téléphoniques différentes 25 suivant un ordre déterminé avec obligation d'acquit pour toutes les destinations, et ce sur les réseaux RTC/GSM, ou par SMS ou MAIL, et sont signalées au fil de l'eau sur une imprimante locale. The alarms can be sent to 5 different telephone directions in a predetermined order with acknowledgment obligation for all the destinations, and this on the PSTN / GSM networks, or by SMS or MAIL, and are reported over the water on a local printer.

L'équipement nécessite une alimentation électrique traditionnelle de 230v 30 monophasée. En cas de suppression accidentelle de la fourniture d'électricité, une batterie de sauvegarde permet de conserver toutes les valeurs contrôlées en mémoire, avec envoi d'une alarme jusqu'au retour du courant. The equipment requires a traditional 230v 30 single phase power supply. In case of accidental deletion of the supply of electricity, a backup battery keeps all the values checked in memory, sending an alarm until the power is restored.

35 40 45 Une brève présentation des différentes figures constituant le dessin. 35 40 45 A brief presentation of the different figures constituting the drawing.

Cette invention sera mieux explicitée, et son concept apparaîtra plus clairement avec le descriptif suivant associé à l'exemple ci-annexé en référence figure 1. This invention will be better explained, and its concept will appear more clearly with the following description associated with the example attached herewith reference 1.

La figure 1 montre le schéma général de principe de l'application sur une installation hydraulique d'eau chaude sanitaire conventionnelle. L'eau froide générale arrive dans un ballon de stockage (12) ou elle se retrouve réchauffée par un procédé thermique traditionnel (électrique, chaudière fuel, chaudière gaz, capteur solaire, autres procédés) et est mise à disposition de l'utilisation (14). En complément de cette logique de distribution, la pompe de bouclage (13) assure un maintient permanent dans tout le circuit d'une température constante. Figure 1 shows the general diagram of the principle of the application on a hydraulic installation of conventional domestic hot water. The general cold water arrives in a storage tank (12) where it is warmed by a traditional thermal process (electric, fuel boiler, gas boiler, solar collector, other processes) and is made available for use (14). ). In addition to this distribution logic, the looping pump (13) ensures a permanent maintenance throughout the circuit of a constant temperature.

L'automate de traitement anti-légionellose (1) assure le contrôle des paramètres suivants Mesure du débit volumétrique (2) entrant dans une plage de 11/h à 70 m3/h. - Mesure de la valeur de potentiel hydrogène (3) Mesure de la valeur redox sur la boucle retour ECS (4) Calcul du nombre de ppm de chlore libre résiduel dans le circuit retour ECS suivant la formule : C = 10 ( E-715-50(7-pH) ) 300+50(7-pH) - Mesure de la limite haute de valeur redox sur le départ ECS (5) - Calcul du nombre de ppm de chlore libre dans le circuit départ ECS suivant la formule : C = (E-715-50(7-pH) 300+50(7-pH) Mesure de la température de départ d'eau chaude sanitaire (6) Mesure de la température de retour d'eau chaude sanitaire (7) Calcul du AT entre le départ (6) et le retour (7) Mesure de la pression (8) du circuit ECS The anti-legionellosis treatment automaton (1) ensures the control of the following parameters Measurement of the volumetric flow rate (2) entering a range from 11 / h to 70 m3 / h. - Measurement of the hydrogen potential value (3) Measurement of the redox value on the DHW return loop (4) Calculation of the number of ppm of residual free chlorine in the DHW return circuit according to the formula: C = 10 (E-715- 50 (7-pH)) 300 + 50 (7-pH) - Measurement of the redox high limit on the DHW flow (5) - Calculation of the number of ppm of free chlorine in the DHW flow according to the formula: C = (E-715-50 (7-pH) 300 + 50 (7-pH) Measurement of the flow temperature of domestic hot water (6) Measurement of the return temperature of domestic hot water (7) Calculation of AT between the flow (6) and the return (7) Measurement of the pressure (8) of the DHW circuit

Par rapport à la consigne de 1 ppm de chlore actif, l'automate (1) analyse les différents paramètres précédents et pilote la pompe doseuse (9) d'une capacité de débit de 1 à 50 litres à l'heure sous une plage de contre pression de 3 à 20 bar de manière à envoyer dans le circuit d'eau chaude sanitaire la quantité nécessaire de mélange chloré contenu dans le bac (10) d'une capacité variant de 50 à 250 litres et ce par le biais de la canne d'injection (11). With respect to the setpoint of 1 ppm of active chlorine, the controller (1) analyzes the various preceding parameters and controls the metering pump (9) with a flow capacity of 1 to 50 liters per hour in a range of against pressure of 3 to 20 bar so as to send into the domestic hot water circuit the necessary amount of chlorinated mixture contained in the tank (10) with a capacity ranging from 50 to 250 liters and this through the cane injection (11).

Le calcul de l'automate (1) est effectué par rapport à tous les paramètres énoncés précédemment, de ce fait, qu'il y ait ou non soutirage par l'utilisation (14), la quantité de chlore actif injectée et mesurée dans le réseau de bouclage véhiculée par la pompe (13) reste constante et identique à la consigne.45 Un exposé détaillé d'au moins un mode de réalisation. The computation of the automaton (1) is carried out with respect to all the parameters previously stated, whether or not there is withdrawal by the use (14), the quantity of active chlorine injected and measured in the The loopback network conveyed by the pump (13) remains constant and identical to the setpoint. A detailed description of at least one embodiment.

L'équipement comprend un coffret principal assurant l'automatisme et la traçabilité sur site ou à distance par modem, ainsi que tous les différents capteurs de mesures hydraulique d'eau sanitaire. The equipment includes a main box providing automation and traceability on site or remotely by modem, as well as all the different sensors for the measurement of domestic water.

Susceptible d'application industrielle Le dispositif selon l'invention est particulièrement destiné au traitement des problèmes de légionelles dans les réseaux hydrauliques sanitaires par chloration, et justification de la bonne exécution par traçabilité et alarme si nécessaire au travers du réseau informatique local, ou à distance par le biais du modem de l'automate. Likely to Industrial Application The device according to the invention is particularly intended for the treatment of Legionella problems in sanitary hydraulic networks by chlorination, and justification of good performance by traceability and alarm if necessary through the local computer network, or remotely through the modem of the PLC.

D'autres caractéristiques intéressantes sont la présence des différents capteurs qui en liaison avec à l'automate le renseignent par le biais de signaux analogiques (4-20 ma, 2-10 v, Pt 1000) ou de signaux impulsionnels (T/R). L'ensemble de ces éléments permet à l'automate de piloter la pompe doreuse de chloration par rapport à la consigne paramétrée pour assurer le maintien de la valeur de chlore libre actif dans le réseau hydraulique sanitaire. Other interesting features are the presence of the various sensors connected to the PLC by means of analog signals (4-20 mA, 2-10 V, Pt 1000) or pulse signals (T / R). . All of these elements allows the controller to control the gilding pump chlorine compared to the set parameter to ensure the maintenance of free active chlorine value in the water system.

30 35 40 45 30 35 40 45

Claims (7)

Revendications1) Dispositif de traitement continu anti-légionellose pour circuit hydraulique sanitaire, caractérisé en ce qu'il comporte un automate (1) de télésurveillance assurant la traçabilité et la régulation par le biais de la mesure de débit d'eau (2) du circuit hydraulique sanitaire, la mesure du potentiel hydrogène (3) du circuit hydraulique sanitaire, la mesure de la valeur rédox retour (4) du circuit hydrau- -lique sanitaire, la mesure de la valeur rédox départ (5) du circuit hydraulique sanitaire, la mesure de la température départ (6) du circuit hydraulique sanitaire, la mesure de la température retour (7) du circuit hydraulique sanitaire, la mesure de la pression (8) du circuit hydraulique sanitaire, la commande de la pompe doseuse (9) qui puise le mélange chloré dans le bac (10), et envoie le dit mélange dans le circuit hydraulique sanitaire par la canne d'injection (11). Claims1) Anti-legionellosis continuous treatment device for a sanitary hydraulic circuit, characterized in that it comprises a remote monitoring automaton (1) ensuring the traceability and regulation by means of the measurement of the water flow (2) of the circuit sanitary hydraulics, the measurement of the hydrogen potential (3) of the sanitary hydraulic circuit, the measurement of the redox return value (4) of the sanitary hydraulic circuit, the measurement of the starting redox value (5) of the sanitary hydraulic circuit, the measurement of the flow temperature (6) of the sanitary hydraulic circuit, measurement of the return temperature (7) of the sanitary hydraulic circuit, measurement of the pressure (8) of the sanitary hydraulic circuit, control of the metering pump (9) which draws the chlorinated mixture into the tank (10), and sends said mixture into the sanitary hydraulic circuit via the injection rod (11). 2) Dispositif selon la revendication 1 dans lequel le dit automate gère l'ensemble des capteurs de paramètres de débit, pression, température, valeur de rédox et de potentiel hydrogène, ainsi que la gestion du système d'injection avec son bac de réactif, contenant le mélange chloré à base d'hypochlorite de sodium à 36 ° chlorométrique. 2) Device according to claim 1 wherein said controller manages all of the parameters sensors flow, pressure, temperature, redox value and hydrogen potential, and the management of the injection system with its reagent tray, containing the chlorinated mixture based on sodium hypochlorite at 36 ° C. 3) Dispositif selon la revendication 2 dans lequel les différents capteurs renseignent l'automate par le biais de signaux analogiques (4-20ma, 0-10v, ptl000) 25 et de signaux impulsionnels. 3) Device according to claim 2 wherein the various sensors inform the controller via analog signals (4-20ma, 0-10v, ptl000) 25 and pulse signals. 4) Dispositifs selon la revendication 3 dans lequel l'analyse et la gestion des valeurs mesurées permettent à l'automate de réguler le système d'injection, et de justifier de son bon fonctionnement par le contrôle de la traçabilité. 4) Devices according to claim 3 wherein the analysis and the management of the measured values allow the controller to regulate the injection system, and to justify its proper functioning by the control of traceability. 5) Dispositif selon les revendications précédentes dans lequel la valeur injectée dans le circuit hydraulique sanitaire départ, et mesurée sur le circuit hydraulique sanitaire retour, n'excède pas les lppm de chlore libre actif. 35 5) Device according to the preceding claims wherein the value injected into the sanitary circuit departure, and measured on the return hydraulic circuit, does not exceed the lppm free active chlorine. 35 6) Dispositif selon les revendications précédentes dans lequel les mesures et les fonctions sont mémorisées dans la mémoire de l'automate, et présentées sous formes de traces dans le journal du logiciel d'exploitation. 6) Device according to the preceding claims wherein the measurements and functions are stored in the memory of the controller, and presented in the form of traces in the log of the operating software. 7) Procédé pour le traitement continu d'une eau caractérisé en ce que l'on met 40 en oeuvre le dispositif selon les revendications précédentes et dans lequel on paramètre une valeur de chlore libre actif à maintenir constante dans le réseau hydraulique sanitaire justifiée par l'autocontrôle de la traçabilité. 30 45 7) Process for the continuous treatment of a water, characterized in that the device according to the preceding claims is implemented and in which an active free chlorine value is set to be maintained constant in the sanitary hydraulic network justified by the self-monitoring of traceability. 30 45
FR0803508A 2008-06-23 2008-06-23 ANTI-LEGIONELLOSE TREATMENT OF HYDRAULIC HEATING NETWORKS UNDER CHLORINATION WITH AUTOMATED CONTINUOUS TRACEABILITY ON COMPUTER SYSTEMS. Active FR2932685B1 (en)

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FR0803508A FR2932685B1 (en) 2008-06-23 2008-06-23 ANTI-LEGIONELLOSE TREATMENT OF HYDRAULIC HEATING NETWORKS UNDER CHLORINATION WITH AUTOMATED CONTINUOUS TRACEABILITY ON COMPUTER SYSTEMS.

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO2015158770A1 (en) * 2014-04-15 2015-10-22 Klaro Gmbh Method and device for sanitizing water
CN113757787A (en) * 2021-09-14 2021-12-07 宁夏电投热力有限公司 Intelligent temperature control terminal for intelligent heating system

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