Data structure

Initial data

Automation object

A BKZ-210 boiler

The used fuel

Primary fuel: coal

Reserve fuel: fuel oil

Kindling fuel: bottled gas

Nominal mode parameters

Performance: 210 t / h

Operating pressure: 140 kg / cm²

Superheated steam temperature: 560 °C

Load
(base / control)

Steam consumer: a main pipe;

Control mode (with main regulator)

Composition of the technological units

Table 3.2

Required APCS structure

System functions

Metrical calculation, remote control, technological protection, process interlock, automatic control system (ACS), functional group control (FGC)

Automated workstations of the user and service staff. Control desk

Automated workstation of a process control operator

Automated workstation of an APCS engineer (service staff of thermal instrumentation & control shop)

Devices composition of the object

Table 3.3

Composition of the actuators (valves)

Table 3.4

Composition of the signals

(input and output, analog and discrete)

Table 3.5

Composition of the functions

Appendix 1

Reserve system (in case of DCS failure)

Appendix 2

Composition of MD tasks

(user and service staff)

Appendix 3

Technological protection composition

Appendix 1, table 1

ACS composition

Appendix 1, table 3

FGC composition

Appendix 1, table 3

Measuring channel (MC) composition

See the Metrology Software chapter

System purpose indices

Performance parameters: Table 4.1

Reliability parameters: Table 4.3

Inaccuracy parameters: Table 4.4

#

Name of unit

Number

1

Power supply

1

2

Steam reheater

1

3

Air path

1

4

Gas path

1

5

Solid fuel

1

6

Coal-pulverization system

2

7

Oil steam traced pipeline

1

8

Fuel oil injectors

4

9

Kindling gas

1

Devices

Number

Capacity, kW

Voltage, kV

Note

Blower fan

2

200

0,4

Exhauster

2

500

6

Ball drum mill, A/B

2

400 / 500

6

Mill exhauster fan, A/B

2

320 / 400

6

Raw coal feeder

2

12.0

0.4 (at the control station)

With speed control

Pulverized coal feeders

8

0.9

0.4 (at the control station)

With speed control

Total:

18

Name

Number

Electrified shutoff valves

49

Control valves with a positioner

37

Shutoff valves with a single-turn electric actuator without a positioner

4

Safety shutoff valve (solenoid)

8

Signal type

Number

Analog measuring signals (MC)

Chrome-aluminum thermocouple, Chrome-copel thermocouple

159

Thermistor cuprum, Thermistor platinum

37

Pressure, drop, level: 4-20 mA

70

Chemical analysis: 4-20 mA

7

Auxiliary devices

Current of the engines: 4-20 mA

18

Capacity of the engines: 4-20 Ma

-

Analog signals, non-measuring (non MC)

Valves with single-turn electric actuator without regulator control: 4-20mA

13

Control valves with regulator control: 4-20mA

24

Output and analog (control of a raw coal feeder)

10

Discrete signals

Discrete parameters (dry contact)

75

Discrete inputs: single-ended valves and auxiliary devices

236