Description: Das Projekt "Waste heat utilization of a blast furnace by the use of a heat pump" wird vom Umweltbundesamt gefördert und von Krupp Hoesch Stahl durchgeführt. Objective: To utilize the waste heat of blast furnace using a heat pump. The temperature of the coolant circuits is 57 deg. C which is raised to 90 deg. C by means of a heat pump and so waste heat is fed into the existing hot water heating networks. It is expected to achieve a 2265 TOE//year energy saving at project level. Payback time estimated at 3.1 years. In case of success, this technology could be transferred to about 100 blast furnaces in the Community, corresponding to an available waste heat potential of about 885 000 TOE/year. General Information: Blast furnaces are generally cooled by three cooling water circuits: the circuit for cooling the blast tuyerers, the hot blast slide valves, and the staves. About 42 GJ/h of waste heat are dissipated today unutilized by the water/air cooling systems. The cooling water temperature at the blast furnace No 7 of the Hoesch Stahl AG is about 57 deg. C, and the heat pump proposed to be installed will raise the temperature level at 90 deg. C, and feed the waste heat into the existing hot water heating networks. The heat pump will be powered by a back pressure turbine. With this turbine the unutilized steam energy (enthalpy) of the reduction station between the existing 33 bar and 12 bar steam network can be utilized. The first step of the project is to combine the separately operated heating centers. After the installation of the heat pump unit and the integration of the heating centres, the heat pump will supply the hot water network with heat. The construction costs are estimated at 3.8Million DM (year 85). Costs reduction of up to 20 per cent are expected for units of this type. In addition to the energy saving the annual operating and maintenance costs will decrease significantly by establishing a central hot water network. Compared to the units operating today, a saving of about 225 000 DM (year 85) is taken into account for operating and maintenance costs.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Enthalpie ? Abwärmenutzung ? Kühlwasser ? Temperaturverteilung ? Wärmeversorgung ? Wasserdampf ? Wassertemperatur ? Kühleinrichtung ? Abwärme ? Amortisation ? Futtermittel ? Hochofen ? Kostenrechnung ? Kühlmittel ? Wärmeerzeugung ? Wärmepumpe ? Warmwasser ? Warmwasserbereitung ? Investitionskosten ? Kostensenkung ? Kreislaufsystem ? Kühlsystem ? Kühlung ? Betriebskosten ? Energie ? Energieeinsparung ? Energiegewinnung ? Energiekosten ? Wirtschaftlichkeit ? Stahl ? Instandhaltung ? Abwärmepotenzial ? Mehrfachnutzung ? Metallurgie ? Sprengung ? Heizung ? Netz ? Armatur ? Turbomaschine ? Ventil ? Wärmeverlust ? renewable sources of energy ? Temperaturerhöhung ?
Region: Nordrhein-Westfalen
Bounding box: 6.76339° .. 6.76339° x 51.21895° .. 51.21895°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1986-02-01 - 1988-11-30
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