Presentation on theme: "Pannon Power – Biomass Power Plant project combustion flow measurement using a diff.pressure Pitot tube and a unique calibration method Manninger Gusztav."— Presentation transcript:
Pannon Power – Biomass Power Plant project combustion flow measurement using a diff.pressure Pitot tube and a unique calibration method Manninger Gusztav Flowell Kft.
Old Power station building – new plant – fixed isometric There can not be measured any flow ! – there are no straight pipe lines –But there are valves just ahead of the measuring points –And we have elbows…….which should avoid ! look at the isometric: What’s the problem ?
Flow rate measurement with a probe by the principle of differential pressure method Evaluation with the Microprocessor Unit D-FL 100-10 (optional) Adjustable parameters Load-independent current for line recorder and indicator instrument Overview
stack diameter 0.3 to 8 m (Probe I: 0.3 to 2 m, Probe II: 2 to 4 m; Probe III: 4 to 8 m) minimum gas velocity 3 m/s for gases above dew point temperatures up to 400°C / stainless steel 1.4571 temperatures up to 700°C / Inconel 600 special materials for acid gases / Hastelloy C276 accuracy guaranteed better than ±2% according to VDI 2066 transmitter mountable on the probe or separately cross-over cock for zero-point control and backflow purging long maintenance intervals > 3 month dust loads up to 150 mg/nm3 without automatic purging systems microprocessor evaluation unit for temperature and absolute pressure compensation very robust system transmitters are factory calibrated easy to install DFL100 aplicable:
Density nn standard density under standard conditions PnPn standard pressure = 1,013 x 105 Pa P operating pressure in Pa TnTn standard temperature = 0°C T operating temperature in °C Volume Flow Standard Volume Flow
Low flow, huge diameter, looking for the cheepest solution – as it used to be No ultrasonic possibilities just because the very low pressure No more dp loss is allowed Short delivery time THE ONLY POSSIBILITY A DP MEASURING NO CHANCE FOR VENTURI AVERAGING PITOT TUBE - WITH AN UNIQUE CALIBRATION MADE BY Possibilities
There is a VENTURI master meter in a common pipe line –d=1000 mm –D=2000 mm –L=11873 mm All the 6 pcs. of DURAG DFL100 probe can be easily blindid Different flowrates – fast response Small type of shut off valves – for blinding all the 6 DFL100 Measuring points with opening/closing pipe sections – calibrating to the master meter, and to thouse probes which are installed perfectly 3 probes are percfectly installed 3 probes had no space for the right installation Calibration method
QventABCDEFdP VentureNm³/h VentSzelep nyitva 45%4600037000200000370023000756F129700 45%4600037800200000210006000751E130800 45%45000370002000015000130000760D130000 45%33000100026000170001300020000570C110000 45%22000490002000013000B104000 A0 0 70%40000720003100020000 240001850145000207000 55%3200057000250001600012000190001100113500161000 45%2600047000200001300080001600073092300130000 35%2100037000160001000045001200045071300100500 30%1800032000135008800350095006100085300 30%2400080000128007000150004760066800 45%360008000019000160002300072000102000 45%55000470002400030000085000129000 35%42500365001900020000066000100000 Some resoults at different flow rates……