WEST OFFALY POWER PEAT FIRED PLANT FUNCTIONAL DESCRIPTION OF I&C LOOPS AUXILIARY STEAM SYSTEM. Document Code: 1 (11) Issuing date: Status: Project :

Size: px

Start display at page:

Download "WEST OFFALY POWER PEAT FIRED PLANT FUNCTIONAL DESCRIPTION OF I&C LOOPS AUXILIARY STEAM SYSTEM. Document Code: 1 (11) Issuing date: Status: Project :"

Leo Burke
5 years ago
Views:

1 Document Code: 1 (11) Project : WEST OFFALY POWER PEAT FIRED PLANT Author: Approved: Language: JJA Document title: FUNCTIONAL DESCRIPTION OF I&C LOOPS AUXILIARY STEAM SYSTEM Submitted for: Customer reference: Other information:

2 Document Code: 2 (11) CONTENT: 1. INSTRUMENT LOOPS & CLOSED LOOP CONTROLS... 3 S1LBC30CF901 Steam Flow To Feed Water Tank... 3 S1LBC30CF201 Steam Flow To Feed Water Tank... 3 S1LBC30CP201 Steam Pressure To Feed Water Tank... 3 S1LBC30CT201 Steam Temperature To Feed Water Tank... 4 S1LBD20CF201 Auxiliary steam flow... 4 S1LBD20CF901 Auxiliary steam flow, calc S1LBG01CP201 Aux. steam header pressure... 5 S1LBG01CT201 Aux. steam header temperature... 5 S1LBG40CT201 Auxiliary steam temp S1LBG40CT202 Auxiliary steam temp S1MAW11CT201 T/G sealing steam temperature MOTORS AND SHUT-OFF VALVES... 6 S1LAF40AA101 Auxiliary Steam Spray Water Shut-off Valve... 6 S1LBC30AA101 Feed Water Tank Steam Line Shut-off Valve... 7 S1LBC40AA101 The Auxiliary Steam Red Station Shut-off Valve... 8 S1LBD10AA101 Shut off Valve for Extraction 4 Steam to Feed Water Tank... 8 S1LBD20AA101 Shut off Valve for Extraction 4 Steam to Auxiliary Steam Header... 9 S1LBG10AA101 Extraction 3 Steam Shut-off Valve to Air Preheaters... 9 S1LBG45AA101 Extraction 3 Steam Shut-off Valve to Auxiliary Steam Header S1LBG50AA101 Auxiliary Steam Header Shut off Valve

3 Document Code: 3 (11) INSTRUMENT LOOPS & CLOSED LOOP CONTROLS S1LBC30CF901 Steam Flow To Feed Water Tank Function Alarms Indicates steam flow corrected with pressure and temperature to the feed water tank. The correction measurements are S1LBC30CP201 Steam pressure to the feed water tank S1LBC30CT201 Steam temperature to the feed water tank Information to other loops S1LBC30CF201 Steam Flow To Feed Water Tank Function Indicates steam flow to the feed water tank Alarms Information to other loops S1LBC30CF S1LBC30CP201 Steam Pressure To Feed Water Tank Function Indicates steam pressure to the feed water tank Alarms 3

4 Document Code: 4 (11) Information to other loops S1LBC30CF S1LBC30CT201 Steam Temperature To Feed Water Tank Function Indicates steam temperature to the feed water tank Alarms Information to other loops S1LBC30CF S1LBD20CF201 Auxiliary steam flow Function Indicates the auxiliary steam flow from extraction Alarms Information to Other Loops S1LBD20CF901 Auxiliary steam flow, calc Function Alarms Indicates the auxiliary steam flow from extraction 4. Corrected with steam pressure (S1LBG01CP201) and temperature (S1LBG01CT201) 4

5 Document Code: 5 (11) Information to Other Loops S1LBG01CP201 Aux. steam header pressure Function Alarms Indicates the steam pressure in the auxiliary steam header. Pressure is controlled with the auxiliary steam reduction station S1LBC40AA201, when auxiliary steam is taken from the cold reheat line. Pressure > max Pressure < min Information to Other Loops S1LBD20CF901 S1LBG01DP S1LBG01CT201 Aux. steam header temperature Function Alarms Indicates the steam temperature in the auxiliary steam header. Temperature > max Temperature < min Information to Other Loops S1LBD20CF S1LBG40CT201 Auxiliary steam temp Function Indicates the auxiliary steam temperature after auxiliary steam reduction station. Temperature is controlled with auxiliary steam reduction station spray water control valve S1LAF40AA201. 5

6 Document Code: 6 (11) Alarms Temperature > max Information to Other Loops S1LBG40CT202 Auxiliary steam temp Function Indicates the auxiliary steam temperature after auxiliary steam reduction station Alarms Temperature > max Information to Other Loops S1MAW11CT201 T/G sealing steam temperature Function Indicates the auxiliary steam temperature in th steam turbine gland steam line Alarms Temperature < min Information to Other Loops MOTORS AND SHUT-OFF VALVES S1LAF40AA101 Auxiliary Steam Spray Water Shut-off Valve Function The valve opens and closes the spray water line to auxiliary steam reduction station 6

7 Document Code: 7 (11) Interlocking The valve is switched to auto mode when the auxiliary steam temperature controller S1LBG40DT201 is switched to auto mode In auto mode the valve will open, when the auxiliary steam temperature control deviation is more than max In auto mode the valve will close, when the control output of the auxiliary steam temperature controller is zero The valve can be controlled manually from the DCS screen Alarms Information to other loops S1LBG40DT S1LBC30AA101 Feed Water Tank Steam Line Shut-off Valve Function Interlocking The valve opens and closes the steam line to feed water tank The valve is switched to auto mode when the feed water tank pressure controller S1LAA10DP201 is switched to auto mode In auto mode the valve will open, when the FW tank pressure control deviation is more than max In auto mode the valve will close, when the control output of the FW tank pressure controller is zero The valve can be controlled manually from the DCS screen Alarms Information to other loops S1LAA10DP201 7

8 Document Code: 8 (11) S1LBC40AA101 The Auxiliary Steam Red Station Shut-off Valve Function Interlocking Alarms The valve opens and closes the steam line to auxiliary steam reduction station The valve is switched to auto mode when the auxiliary steam pressure controller S1LBG01DP201 is switched to auto mode In auto mode the valve will open, when the auxiliary steam pressure control deviation is more than max In auto mode the valve will close, when the control output of the auxiliary steam pressure controller is zero The valve can be controlled manually from the DCS screen The valve is closed with 2 minutes delay if temperature S1LBG40CT202 > max Information to other loops S1LBG01DP S1LBD10AA101 Shut off Valve for Extraction 4 Steam to Feed Water Tank Function The valve opens and closes the steam line from extraction 4 to feed water tank In auto mode the valve will open, when the extraction 4 steam pressure is more than min 1 In auto mode the valve will close, when the extraction 4 steam pressure is less than min 2 The valve can be controlled manually from the DCS screen Interlocking Alarms 8

9 Document Code: 9 (11) Information to other loops S1LBD20AA101 Shut off Valve for Extraction 4 Steam to Auxiliary Steam Header Function The valve opens and closes the steam line from extraction 4 to auxiliary steam header In auto mode the valve will open, when the extraction 4 steam pressure is more than min 1 In auto mode the valve will close, when the extraction 4 steam pressure is less than min 2 The valve can be controlled manually from the DCS screen Interlocking Alarms Information to other loops S1LBG10AA101 Extraction 3 Steam Shut-off Valve to Air Preheaters Function The valve opens and closes the steam line from extraction 3 to primary and secondary air preheaters In auto mode the valve will open if S1LBS10CP201 Extraction 3 steam pressure is more than min In auto mode the valve will close if S1LBS10CP201 Extraction 3 steam pressure is less than min AND S1LBG45AA101 Extraction 3 steam shut off valve to auxiliary steam header is opened The valve is controlled manually from the DCS screen 9

10 Document Code: 10 (11) Interlocking Alarms Information to other loops Opened signal to S1LBG45AA S1LBG45AA101 Extraction 3 Steam Shut-off Valve to Auxiliary Steam Header Function Interlocking The valve opens and closes the steam line from extraction 3 to auxiliary steam header In auto mode the valve will open if S1LBS10CP201 Extraction 3 steam pressure is less than min In auto mode the valve will close if S1LBS10CP201 Extraction 3 steam pressure is more than min AND S1LBG10AA101 Extraction 3 steam shut off valve to air preheaters is opened The valve is controlled manually from the DCS screen Alarms Information to other loops Opened signal to S1LBG10AA S1LBG50AA101 Auxiliary Steam Header Shut off Valve The valve opens and closes the steam line from auxiliary steam header to feed water tank 10

11 Document Code: 11 (11) Interlocking The valve is switched to auto mode when the feed water tank pressure controller S1LAA10DP202 is switched to auto mode In auto mode the valve will open, when the FW tank pressure control deviation is more than max In auto mode the valve will close, when the control output of the FW tank pressure controller is zero The valve can be controlled manually from the DCS screen Alarms Information to other loops S1LAA10DP202 11

Document Code: 1 (8) Issuing date: Status:

Document Code: 1 (8) Issuing date: Status: Document Code: 1 (8) Project : MULTI FUEL CFB BOILER SIMULATOR Author: Approved: Employer: JJA Document title: SYSTEM DESCRIPTION TURBINE CONTROL Submitted for: Employer reference: Other information: Document