Coal system
Sponsored Links
This presentation is the property of its rightful owner.
1 / 20

Coal System PowerPoint PPT Presentation


  • 169 Views
  • Uploaded on
  • Presentation posted in: General

Coal System. Combustion optimization Coal G3 Online measurement of the coal mass flow between the mill and the burner Real time!. Example Pipe Arrangement. Receiver. Transmitter. A. w. o. l. f. s. s. a. m. In case of roping: cover full cross section.

Download Presentation

Coal System

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Coal System

Combustion optimization

Coal G3

Online measurement of the coal mass flow between the mill and the burner Real time!


Example Pipe Arrangement


Receiver

Transmitter

A

w

o

l

f

s

s

a

m

In case of roping:

cover full

cross section

Easy installation:

The sensors are mounted through easy drill and tap holes (14x1 mm)

MECONTROLCoalMeasurement Principle „density“

Microwave measurement:

2 sensors in one pipe are used to measure the coal concentration over the FULL cross sectional area of the pipe.


Signal Sensor 1

Coal Dust Pipe

“Signature”

Signal Sensor 2

Sensor 2

Sensor 1

X(t)

Y(t)=X(t-T)

S=const.

T=-26 ms

Optimum of

correlation

“Correlation”

correlation

Time T

Example

S=54 cm

T=26 ms

w=20,8 m/s (average velocity of the particles !)

MECONTROL CoalMeasurement Principle „velocity“

Velocity

W=S/T


Measurement Cabinet

Microwave Board D-HF

Amplifier

VCO

MW-Output

Time basis

Processor

MW-Input

Data output

Power input

Temp.input

RS 232

MECONTROL Coal Measurement Cabinet


G3-Sensor

Temperature

measurement sensor

MECONTROL Coal Sensor installation


NEW MECONTROL COAL G3 System


1 h high time resulution plot of

mass flow and velocity


Mill shut down sequence over 4:40 h time window


Derived mill parameters

t1 t2

Mill response time can be derived,

Impact on load changes,

Indication for mill wear and coal

grindability


Mill Quality monitoring:

Low standard deviation of concentrations and velocities

Variation of

velocity 1s:

0.7 m/s

(2.1 ft/sec)

Variation of

coal loading

1s:

50 g/m


MECONTROL Coal

Velocity

Velocity is measured using a cross correlation technique (picture: pipes 1 through 8). Measurement range:

5 m/sec to 50m/sec


MECONTROL Coal

Absolute mass flow

Out of the independent measurement values, density and velocity, the absolute mass flow is calculated without using any feeder signal.

Measurement range:

10 g/sec to 20 kg/sec


MECONTROL Coal

Combustion optimization by Secondary air control

without control active control


we focus on your process

O2

NOx

CO

MECONTROL boiler optimization with secondary air control using MECONTROLCoal


Air-to-Fuel Ratio


Burner Air Register Settings

Air Register Settings [%]

50-20-20-20-20-20-20-50 O2 setpoint 3.1%

50-20-20-20-20-30-50-80 O2 setpoint 3.1%

50-20-20-20-20-20-50-80 O2 setpoint 3.1%

50-20-20-20-20-20-50-80 O2 setpoint 2.5%

50-20-20-20-20-20-50-80 O2 setpoint 2.2%

50-20-20-20-20-30-50-80 O2 setpoint 2.2%

Right boiler sidewall

Left boiler sidewall


Variable Orifices

Example Pipe Arrangement


Damper Location on the Top of the Classifier

Damper, one sided; direction against flow rotation

Damper as close as possible on the top of the classifier


MECONTROL Coal References

  • Since 1998 in total ca. 600 Measurement Installations at 45 Plants worldwide

  • Countries: Germany, USA, Japan, Turkey, Denmark

  • Customers: E.ON, Mainova, SaarEnergie, STEAG, EnBW, J-Power, AEP, Allegheny Energy, LG&E, NSP, Mission Energy, TVA, Alliant Energy, Dynegy, Consumers Power, First Energy, Santee Cooper, SCE&G, Xcel Energy


  • Login