Description: Das Projekt "Optimization of the combustion of pulverized coal through measurement and regulation of the coal mass flow" wird vom Umweltbundesamt gefördert und von uATZ-EVUS Applikations- und Technikzentrum für Energieverfahrens-, Umwelt- und Strömungstechnik durchgeführt. Objective: Demonstration of a newly developed mass flow device (CORIOLIS-METER) for the accurate measuring of the mass flux of coal dust to power station boilers. By of exact metering of the coal dust mass flux improved control of combustion conditions will be possible and thus exact regulation of the coal-air-ratio to each burner separately. By limiting the excess air-ratio it should be possible to reduce heat losses and NOx-emissions. The operation of the mass flux meter will be tested in pilot plant scale simulating real power plant conditions and in real power plants. Long-term-tests shall prove the reliable operation and the accurate measurement. General Information: At ATZ-EVUS a CORIOLIS Mass-Flow meter was developed for exact metering of coal dust mass flux in pneumatic transport. The device is able to handle absolute pressure up to l5 bar, so that it is especially fitted for use in pneumatic transport system. The mass flow signal is linear and simple integration versus time gives the total mass in a certain period of time. The metering device was preleminary tested in metallurgical batch-processes where the mass flux of are and coal dust was measured. In order to demonstrate that the CORIOLIS-Meter is applicable to the harsh environments of power plants the following investigations during the demonstration project are planned: - test runs of the CORIOLIS-Meter in a pilot plant, simulating the operation modes in power plants: - Coal dust feeding from storage bins (off-line combustion) - Coal dust feeding directly from the mill (on-line combustion) - In the pilot plants the CORIOLIS-Meter will be tested in the reliable operation for different operation modes (continuous load; load reversal, emergency Cut off etc.). Special emphasis is given to abrasive problems and on low pressure separation from pneumatic conveyer lines by means of special constructed cyclons. - First test runs with simple control systems will prove that mass flux or air flow regulation is possible. - In order to prove the reliable operation long term stability tests two demonstration are foreseen in power plants in Germany and Portugal. In these investigations emphasis is given to the reliable operation under harsh environmental conditions and possibility of the application of CORIOLIS-Meter in power plants. Achievements: The demonstration project has shown, that a CORIOLIS-meter can be applied successfully in coal dust fired combustion systems. The reliable on-line measurement of the coal dust mass flow with the accuracy of smaller than 2 per cent has been proved in pilot plant experiments and long term trials in power plants. Even for highly abrasive materials no wearing appeared. Coal dust mass flow rates up to 50 kg/min. had been realised with the CORIOLIS-meter applied. Higher mass flux rates are possible for larger types. In case of contaminated coal dust (plastic pieces, screws, fibers, etc.) a vibrating sieving system can be applied, which was successfully...
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Zyklon ? Kunststoff ? Kohlenstaub ? Messgerät ? Durchflussmessung ? Langzeitwirkung ? Strömungstechnik ? Bundesrepublik Deutschland ? Portugal ? Warmwasserbereiter ? Betriebsdaten ? Dauerbelastung ? Kohlekraftwerk ? Luftbewegung ? Messprogramm ? Schadstoffemission ? Stickoxide ? Umweltbelastung ? Verfahrensparameter ? Verfahrensoptimierung ? Wärmeerzeugung ? Siebanalyse ? Speicherkraftwerk ? Kraftwerk ? Energietransport ? Messdaten ? Mühle ? Sicherheitstechnik ? Simulation ? Emissionsminderung ? Strömungsmechanik ? Energieeinsparung ? Energiespeicher ? Verfahrenstechnik ? Fließgeschwindigkeit ? Windsichtung ? Luftschadstoff ? Kohlenstaubbrenner ? Kontrollsystem ? Umweltfreundliche Technologie ? Mathematische Methode ? Metallurgie ? Feuerung ? Verkehrssystem ? Versuchsanlage ? Stoffstrom ? Kessel ? Anlagenbetrieb ? Physikalische Größe ? Pilotprojekt ? Messgenauigkeit ? On-Line-Betrieb ? Eignungsfeststellung ? Schadstoffelimination ? renewable sources of energy ? Siebung ? Off-Line-Betrieb ? Wärmeverlust ? Zeitverlauf ? Kraftwerksstandort ?
Region: Bayern
Bounding box: 12.53381° .. 12.53381° x 47.795° .. 47.795°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 1989-03-26 - 1992-09-30
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