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Einsatz von Waerme aus Abwasser und Klaergas aus einer Klaeranlage fuer die Fernwaermeversorgung

Description: Das Projekt "Einsatz von Waerme aus Abwasser und Klaergas aus einer Klaeranlage fuer die Fernwaermeversorgung" wird vom Umweltbundesamt gefördert und von Stadtwerke Waiblingen durchgeführt. Objective: Utilization of the heat potential of cleaned waste water and sewage gases from a sewage treatment plant by means of an absorption heat pump for the heating of several large buildings of the town of Waiblingen. General Information: The planned district heating of the town of Waiblingen consists of an absorption heat pump and 2 gas boilers, operating in a bivalent parallel connection. It has a total heating capacity of 9500 kW (2500 kW heat pump, 2 x 3500 kW boilers). For the supply of the users, a heating capacity of 6450 kW is necessary, the surplus capacity serves as reserve. The plant utilizes the heat potential of cleaned waste water and sewage gases from the town's sewage treatment plant to produce heating waste which is fed in to the network for the heating of 6 public buildings: town hall, covered market, indoor swimming pool, civic center, sewage plant, hospital. The absorption heat pump operates with NH3 a heat carrier and a NH2 - water solution as solvent. The heat source is the waste water from the sewage treatment plant which is cooled down from 9 degree C to 5 degree C in the heat pump evaporator. An automatic brush cleaning system keeps the evaporator free of dirt. The ejection boiler is fired with sewage gas and natural gas. Apart of the ejection boiler's exhaust gas, heat is recovered in a heat exchanger for the heating of the district heating water. In the whole heat pump system, the district heating water is heated from its return temperature of 40 degree C to a supply temperature of 65 degree C. The heat pump covers the base load of the district heating network, it supplies about 77 per cent of the total annual output of the district heating plant. In the case of consumption peaks at low outside temperatures, the boilers, using natural gas and sewage gas as fuel, are switched on. When using the boilers, the temperature of the supply water of the heating network can be raised to 110 degree C. A surplus of hot water produced by the heat pump is fed into an 80 m3 storage tank and can again be taken out in case of an increasing heat demand in the district heating circuit. The calculated energy saving of this heat pump - boiler plant amounts to 880 TOE/y, compared with a monovalent decentral gas boiler concept. The cost of the project amounts to DM 11,434,246. The construction phase of the project has started in 1983. The completion of the demonstration is expected for the end of 1984. Achievements: The Waiblingen plant has operated satisfactorily. Only the development of micro-organisms in the treated waste water on a few days in 1984. These micro-organisms brought about severe fouling of the automatic backwashing filter, which could only be removed by manual cleaning. It is, however, possible to avoid such upset conditions by careful monitoring and by applying adequate cleaning methods. As far as the energetic aspects are concerned, plant operation in practice shows positive and negative deviations from design and ...

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SupportProgram

Origin: /Bund/UBA/UFORDAT

Tags: Klärgas ? Stadtgas ? Amid ? Ammoniak ? Brennstoff ? Erdgas ? Öffentliches Gebäude ? Grundlast ? Krankenhausabwasser ? Fernwärme ? Kläranlage ? Lösungsmittel ? Temperaturverteilung ? Wärmeversorgung ? Wasserlöslichkeit ? Wassertemperatur ? Abwasserwärmepumpe ? Abgaswärme ? Gelöste Stoffe ? Absorption ? Warmwasser ? Warmwasserbereitung ? Abwasserverwertung ? Abwärme ? Krankenhaus ? Filter ? Gebäudetechnik ? Biofouling ? Wärmebedarf ? Gasförmiger Stoff ? Innenstadt ? Tankbehälter ? Warmwasserbereiter ? Wärmeübertrager ? Wärmemarkt ? Wärmepumpe ? Energieträger ? Kommunale Versorgungswirtschaft ? Wirkungsgrad ? Wirtschaftlichkeit ? Mikroorganismen ? Wasser ? Abwasser ? Investitionskosten ? Wärmekapazität ? Wärmelastplan ? Abwasserwärme ? Abwasseranlage ? Konsum ? Energieeinsparung ? Monitoring ? Wasserversorgung ? Heizung ? Städtebau ? Anlagenbetrieb ? Besucherzentrum ? Kessel ? Verdampfung ? Netz ? Waiblingen ?

Region: Baden-Württemberg

Bounding box: 9° .. 9° x 48.5° .. 48.5°

License: cc-by-nc-nd/4.0

Language: Deutsch

Organisations

Time ranges: 1982-08-17 - 1987-04-30

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