automation of bms system of boiler using plc ladder logic

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    AUTOMATION OFBMS SYSTEM OF

    BOILER USING

    PLC LADDER LOGIC

    Authorised By

    SANTOSH BHARADWAJ REDDYEmail: [email protected]

    Engineeringpapers.blogspot.com

    More Papers and Presentations availableon above site

    mailto:[email protected]:[email protected]
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    ABSTRACTThe problem of operation and safety posed by a Recovery Boiler is much

    more than a conventional utility/Industrial Boiler. The Black Liquorfrom Pulp Mill is acquired by Evaporator which is sent to Liquor Fired

    Boiler.

    Recovery Boiler is basically a chemical recovery process unit where the

    organic material in the black liquor is burnt, while the sodium salt isreduced and drained as molten smelt from the furnace bottom.

    At the same time, Super Heated Steam which is the byproduct is utilized

    for steam generation. Flue Gas is sent out through Chimney through I.D

    Fan. The Green Liquor is sent to Causticizing Plant for Generation ofWhite Liquor.

    The BMS System is a part of LIQUOR FIRED BOILER(LFB 5) of Soda

    Recovery Plant. HoneyWell PLC is used to study the BMS System in

    BOILER Plant..

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    In LFB5 the BMS system includes Primary, Secondary/Tertiary fans,

    Liquor Guns, Oil Burner Valves, Induced Draft Fan, Electrostatic

    Precipitator, Economizers, Steam/ Mud Drum, Furnace and Pumps to

    circulate water .

    In BMS system the Furnace is first Purged completely i.e., to flush the

    Furnace with fresh air. In this duration of Purging (120ms) all valves

    should be closed.

    The BMS provides for the proper sequencing of equipment during the

    normal startup operating and shut down procedures and provides for an

    auxiliary fuel trip and/or an alarm during an adverse burner or unit

    operating condition.

    This is accomplished through the use of pre-wired logic and various

    Interlocks.

    The Industrial parameters like Temperature, Pressure, Flow, Level are

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    The Implementation section includes Level Control in a Reaction

    Vessel which is performed using Siemens PLC.

    In Level Control 4 Digital Inputs and 6 Digital Outputs are used. So ,

    taking a prototype of Level Control, I try to use PLC to automate the

    process.

    Initially, the Liquid-1 is filled into Tank/Vessel using a pump via Inlet

    valve-1. There are 3 levels namely Low, Medium, High. When Low and

    Medium levels are reached Inlet valve-1 stops and Inlet valve-2 supplies

    Liquid-2 until the High Level is reached.

    Then Motor mixes both the Liquids for the specified time, the mixture is

    drained out through Outlet valve.

    Timing is to be maintained for running of Motor. Considering the PLC,

    digital input is taken from limit switch.

    The programming can be done by using various Simulation softwares

    like

    VERSAMAX

    SIMATIC S7 etc.

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    Wills Cutter

    Market

    Paper Machines Finishing HouseRewinders Cutters Sales Godown

    Stock Preparation

    Bleached Pulp

    StoragePulp Drying Plant

    Bleaching

    (CD + EOP +D)

    Chlorine Dioxide

    Plant

    Unbleached Pulp

    Storage

    Process Plants

    DG Set Grid Power

    Oxygen

    Generation Plant

    Washing /Screening

    Oxygen

    Delignification Power distribution for

    Process & Colony

    Evaporator

    Digestor

    ChemicalRecovery Boiler

    Causticizing Plant

    Turbo Generator

    Set

    Coal Fired

    Boilers

    Coal Handling

    Plant

    Chipper HouseRaw materials

    Mixed Hard Wood

    & Bamboo

    Coating

    Plant Rewinders Cutters

    JK PAPER MILLS PROCESS FLOW DIAGRAMDust

    White Liquor

    Weak

    Black

    Liquor

    Steam

    Steam

    Steam

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    SMELT

    Pulp to Paper

    Process

    BAMBOO

    &

    WOOD

    RECOVERY

    BOILER

    EVAPORATOR

    G/L

    W W L

    RECAUSTICIZINGAREA

    STEAM

    STEAM

    STEAM

    WBL :16-18%

    CBL :55%-65%

    WHITE LIQUOR

    LIME

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    INTRODUCTI

    ON

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    BMS stands for BURNER MANAGEMENT SYSTEM.

    It is a part of Liquor Fired Boiler in Soda RecoverySection.

    The problem of operation and safety posed by a Recovery

    Boiler is much more than a conventional utility/Industrial

    Boiler.

    It is basically a chemical recovery process unit where the

    organic material in the black liquor is burnt, while the

    sodium salt is reduced and drained as molten smelt from

    the furnace bottom. At the same time, the heat released is

    utilized for steam generation.

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    Though predominantly the heat for the process is obtained from

    the burning of the black liquor, supplementary heat from oil

    fired auxiliary fuel burners is required to start up the unit,

    regulate the char bed , avoid blackouts and to augment

    additional steam.

    Here we are using PLC Programming and developed LadderLogic for Inputs and Outputs. The inputs and Outputs are

    Digital ones.

    The PLC used for BMS is HONEYWELL 620-35 PLC.Software used is 620 WINLOADER Version 5.4 .

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    PULP

    MILL

    WBL

    STORAGE

    TANKS

    EVAPORATORS

    CBL

    STORAGE TANKS

    PUMP

    60-65 DEG.C

    SALT

    CAKE

    MIXING TANK

    ESP ASH TANK

    Na2SO4

    INDIRECT

    HEATER

    102 DEG.C

    HBLSECONDARY

    HEATER

    112 DEG.C

    FURNACE

    118 DEG.C

    MUD

    DISSOLVERTANK

    87-95 DEG.C

    ESP

    DUST

    SMELT

    FLUE GAS

    CAUSTICIZING

    PLANT

    G/L

    W W L

    ID

    FAN

    FLUE GAS

    TO CHIMNEY

    THICKBLACK LIQUOR

    WHITE

    LIQUOR

    LIQUOR FIRED BOILER

    SUPER HEATERSATURATED STEAM

    SUPER HEATED/ DRY STEAM to TURBINE

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    BMS SECTION

    SATURATED STEAM

    HAMMERS

    ESPPLATES

    FEED WATERPUMP

    FLUE

    GAS

    MUDDRUM

    FIRING

    ZONE

    STEAM

    DRUM

    SA /TA

    FA

    NDAYOIL

    TANK

    pump

    S

    TE

    A

    M

    PA

    FA

    N

    SCMT

    HBL

    pump

    S

    T

    EA

    M

    IGNITOR

    ESP ASH

    TANK

    DUST

    IDFAN

    FLUEGAS

    FLUEGAS

    SMELT

    SUPER HEATER

    SUPER HEATED/ DRY STEAM to TURBINE

    ECONOMIZERSSPOUT

    TANK

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    THEORYof

    BMS

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    FEATURES

    The BMS provides for the proper sequencing of equipment

    during the normal startup operating and shut down procedures

    and provides for an Auxiliary fuel trip and/or an Alarm during

    an adverse burner or unit operating condition.

    This is accomplished through the use of pre-wired logic and

    various Interlocks.

    The BMS is a local-manual relay system.

    Starting burners are started and stopped locally from their

    associated local switch boxes while the various header trip

    valves are opened and closed remotely from associated Push

    Buttons on BOILER CONTROL DESK(BCD).

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    SCAVENG

    E

    V/V

    OPENED

    SCAVENG

    E

    V/V

    CLOSED

    FLAME

    SCANNER

    SHOWS FLAME

    FLAME SCANNER

    SHOWS NOFLAME

    BURNE

    R ON

    BURNE

    ROFF

    HEA

    IGNITORADVANCED

    HEA

    IGNITORRETRACTE

    D

    ATOMISIN

    GV/V

    OPENED

    ATOMISING

    V/VCLOSED

    OIL GUN

    ENGAGED

    BURNER

    V/VOPENED

    BURNER

    V/VCLOSED

    BURNER

    1

    SCAVENGE

    V/VOPENED

    SCAVENGE

    V/VCLOSED

    FLAMESCANNER

    SHOWS FLAME

    FLAME SCANNER

    SHOWS NO

    FLAME

    BURNER ON

    BURNER

    OFF

    HEAIGNITOR

    ADVANCED

    HEAIGNITOR

    RETRACTE

    D

    ATOMISING

    V/VOPENED

    ATOMISINGV/V

    CLOSED

    OIL GUNENGAGE

    D

    BURNER

    V/V

    OPENED

    BURNER

    V/VCLOSED

    BURNER

    2

    SCAVENG

    E

    V/V

    OPENED

    SCAVENGE

    V/V

    CLOSED

    FLAME

    SCANNER

    SHOWS FLAME

    FLAME SCANNER

    SHOWS NO

    FLAME

    BURNER ON

    BURNER

    OFF

    HEAIGNITOR

    ADVANCED

    HEA

    IGNITOR

    RETRACTE

    D

    ATOMISIN

    G

    V/V

    OPENED

    ATOMISING

    V/VCLOSED

    OIL GUN

    ENGAGED

    BURNER

    V/V

    OPENED

    BURNER

    V/V

    CLOSED

    BURNER

    4

    SCAVENG

    EV/V

    OPENED

    SCAVENG

    EV/V

    CLOSED

    FLAME

    SCANNERSHOWS FLAME

    FLAME SCANNER

    SHOWS NOFLAME

    BURNER ON

    BURNE

    R

    OFF

    HEAIGNITOR

    ADVANCED

    HEAIGNITOR

    RETRACTED

    ATOMISIN

    G

    V/V

    OPENED

    ATOMISING

    V/VCLOSED

    OIL GUN

    ENGAGED

    BURNER

    V/VOPENED

    BURNER

    V/VCLOSED

    BURNER

    3

    BMS PANEL

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    CLOS

    E

    HORV

    BOILER

    EMERGENCY

    TRIP

    SA/TA

    FAN

    STAR

    T

    PERM

    IT

    BLACK

    LIQUOR

    PUMP

    START

    PERMIT

    ID FAN

    RUNNING

    SA/TA

    FAN

    RUNNIN

    G

    PURGE

    READY

    START

    PURGE

    PUSH

    BUTTON

    EMERGENCY

    DRAIN & TRIP

    PURGE

    IN

    PROGRESS

    PURGE

    COMPL

    ETE

    ALLEMERGEN

    CY DRAINV/V S

    CLOSED

    ATOMIS

    ING

    STEAM

    PRESS

    URE

    LOW

    ATOMISI

    NG

    STEAM

    PRESSU

    RE HIGH

    IDFAN

    START

    PER

    MIT

    PA FAN

    START

    PERMI

    T

    HO

    PRESS

    URE

    LOW

    HO

    TEMPERATUR

    E

    LOW

    PRECIPITA

    TOROUTLET

    TEMP.

    >270

    DEG.C

    PRECIPITAT

    OR

    OUTLET

    TEMP.

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    FUNCTION

    The following operations of the function are achieved in the

    BMS.

    Boiler purge.

    Main oil header trip valve open/close operation.

    Ignitor oil header trip valve open/close operation.

    Auxiliary fuel burner ignitor ON/OFF operation.

    Ignitor Flame scanning.

    Auxiliary fuel burner start/stop operation.

    Auxiliary fuel trip production. Emergency drain trip protection.

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    FURNACE PURGE

    Before any auxiliary fuel can be introduced in the unit(initial

    or after an auxiliary fuel trip)a satisfactory furnace purge cyclemust first be completed. To start a furnace purge cycle,

    proceed as follows:

    Establish an (I.D. Fan Start,Permissive)by completing all of

    the following conditions. *1A. All Emergency drain valves are closed.

    *1B. Main oil header trip valve and ignitor trip valve closed.

    *1C. Feed Water shut off valve is open.

    1D. Evaporator outlet temperature less than 525oF.

    1E. Precipitator outlet temperature less than 525oF.

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    (*) Conditions preceded by an asterish are not required once

    the ID fan is running.

    2. Place I.D. Fan in service.

    3. Place the Fans in service.

    4. Adjust the primary air flow to maintain a minimum of 30%

    of full load air flow.

    5. See that all of the starting and all of the load carrying burnervalves are fully closed.

    6. Reset the boiler trip by depressing the BOILER TRIP

    RESET Push Button.

    7. When the purge ready light comes on indicating that all ofthe purge requirements have been completed depress the

    PURGE START PUSH BUTTON.

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    TRIP VALVE

    OPERATIONMAIN OIL HEADER TRIP VALVE: Depressing the main oil header trip valve open push button

    once the furnace purge is completed, will open the main oil

    header trip valve.

    If the trip valve fails to open, check to see that,

    All burner valves closed.

    No auxiliary fuel trip exists.

    As the trip valve moves from fully closed position the Main

    Oil Header trip valve Open light comes on. When the tripvalve has been fully opened, the main oil header trip valve

    closed light goes out. Once the trip valve is fully open, it will

    be in OPEN position.

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    OILHORV3 WAY

    V/V

    PRESSURE

    CONTROL V/V

    8.0 Kg/cm2

    HOTVPRESSURE

    CONTROL V/V

    15.0 Kg/cm2

    FURNACE OIL

    FURNACE

    HEATER

    DAY

    OIL

    TANK

    SCAVENGE V/V

    HOBV

    STEAM

    PUMP

    OIL BURNER VALVE

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    AUXILIARY FUEL TRIP Any one of the conditions below will cause an auxiliary fuel

    trip to occur,and results in the immediate shutdown of all of

    the auxiliary fuel in service and necessitates completion ofanother furnace purge cycle before any auxiliary fuel firing

    may be reinstated.

    Evaporator outlet temperature greater than 525oF.

    Precipitator outlet temperature greater than 525oF. I.D. Fan not in service.

    Fans not in service.

    Primary Air Flow less than 30% of full load of flow.

    Furnace pressure greater than +4W.G.

    Ignitor oil pressure not within controlled limits.(75% to 125%

    of full load pressure).

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    Ignitor air pressure greater than 75% of full load pressure.

    Main oil pressure below 75% of full load pressure .

    Starting burner oil header pressure above 125% of full loadpressure.

    Load carrying burner oil pressure above 125% of full load

    pressure.

    Recirculation selector switch not in OPERATE position. A Boiler trip condition exists.

    Either of the local auxiliary fuel trip push button depressed.

    Both of the auxiliary fuel trip push buttons on the BCD

    depressed.

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    FURNACE

    FLOW

    METER

    INDIRECT

    HEATER

    DIRECT

    HEATER

    112 DEG.C 118 DEG.C

    HBLPUMP

    PRESSURE

    CONTROL

    V/V

    102 DEG.CHBL

    ASHPUMP

    ESP ASHTANK

    LEVELCONTROL

    V/V

    CBL

    TANK

    CBL

    UMP

    ESP

    ASH

    TANK

    ESP DUST

    ESP

    SCMT

    Na2SO4

    SALT CAKE

    LIQUOR SPRAY GUN

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    EMERGENCY DRAIN AND TRIP

    An emergency drain and trip procedure is initiated if water in

    any amount is known to be entering the furnace and cannot bestopped immediately or if any leaks external to the furnace

    such as failure of gaskets, gage glasses etc.

    An emergency drain is initiated by simultaneously depressing

    the two Emergency Drain push button on the BCD panel. An emergency drain trip initiates the following.

    *1. Auxiliary fuel trip.

    *2. Fan trip.

    3. Closing of the feed water valve.

    4. Opening of the emergency drain valve.

    * Conditions preceded by an asterisk are the same trip

    inputs .

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    BOILER TRIP A boiler trip condition exists when both the boiler trip

    push buttons on the BCD pane are depressed or whenemergency drain is initiated. A boiler trip initiates thefollowing.

    a. Auxiliary fuel trip.

    b. P.A,S.A/T.A Fan trip.

    c. Black liquor pump trip.

    Depressing the two emergency drain push buttons results in an

    instantaneous boiler trip. The feed water supply valve will not close,

    however, until the following conditions are also satisfied.

    All trip valves closed OR

    Ignitor trip valve closed and All oil scanner valves closed.

    The emergency drain valves should not open until the feed-water

    valve is closed (This is an externally interlocked circuit).

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    Alarms

    The following alarm conditions will cause an annunciator alarm

    to sound if the appropriate terminals on the BCD panel are

    connected to the customers annunciators. The contacts are

    normally open for the alarm conditions.

    Furnace pressure greater than +4W.G.

    Air flow less than 30%.

    Ignitor oil pressure less than 75%.

    Ignitor air pressure less than 75%.

    Main oil pressure less than 75%.

    Starting Burner Oil pressure greater than 125%.

    Boiler trip.

    Auxiliary fuel trip.

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    I.D. Fan not running.

    Fans not running.

    Precipitator outlet temperature greater than 525oF. Feedwater shut off valve not open.

    Emergency drain valves not closed.

    Evaporator outlet temperature greater than 525oF.

    Emergency drain and trip.

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    ECONOMIZER: In boilers, economizers are heat exchange devices that heat

    fluids, usually water, up to but not normally beyond theboiling point of that fluid.

    Economizers are so named because they can make use of the

    enthalpy in fluid streams that are hot, but not hot enough to be

    used in a boiler, thereby recovering more useful enthalpy andimproving the boiler's efficiency. They are a device fitted to a

    boiler which saves energy by using the exhaust gases from the

    boiler to preheat the cold water used to fill it (thefeed water).

    http://en.wikipedia.org/wiki/Boilinghttp://en.wikipedia.org/wiki/Enthalpyhttp://en.wikipedia.org/wiki/Boiler_feedwaterhttp://en.wikipedia.org/wiki/Boiler_feedwaterhttp://en.wikipedia.org/wiki/Boiler_feedwaterhttp://en.wikipedia.org/wiki/Enthalpyhttp://en.wikipedia.org/wiki/Boiling
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    PLC used in BMS

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    PLC used is TATA HONEYWELL.

    CPU : IPC 620-35.

    SOFTWARE : 620 WINLOADER,VERSION 5.4

    DC POWER SUPPLY

    DIS : 26, DOS : 25.

    INPUT : 110V/220V or 240V,5.5A Max.

    OUTPUT : 25V DC,20A.

    FREQUENCY : 50 HZ.

    PLC SPECIFICATIONS :-

    32K EXPANDABLE MEMORY. PLC used is a Redundant System.

    I/O Handling Capacity : 2048 Real IOs.

    Scan Rate : 50msec.

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    The PLC used for BMS is HONEYWELL 620-35 PLC. Software used is 620

    WINLOADER Version 5.4 .

    PLC consists of 5 Modules:

    1) Memory module

    2) Register module

    3) System Control module

    4) Processor module

    5) I/O Control module.

    The PLC is Redundant type.

    Redundant system has Running mode and Standby modeslots.

    If Running mode wont work then Standby mode is used byPLC for functioning.

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    A Key is present in the PLC.

    It has four modes:

    1.Program

    2.Disable

    3.Run/Prog.

    4.Run

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    LADDER LOGICS

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    3066

    112 3065 2301 2302 2303 3043 160 368 557

    NO BOILERTRIP

    AUXILLIARYFUEL TRIP

    HOTVCLOSED

    AUXILLIARYFUEL TRIP

    PURGECOMPLETE

    PURGEREADY

    The Condition for Purge Ready is satisfied when Boiler is in healthy

    condition, AFT occurs due to pressure difference. Other interlocks are

    Header Oil v/v should be closed and Purge Complete is kept active

    low.

    ID FANSA/TA FAN FURNACE ID FANAIR FLOW DRUM LEVEL

    PA FAN FURNACE DRUM LEVEL

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    ID FAN

    START

    PERMIT

    SA/TA FAN

    RUNNING

    FURNACE

    PRESSURE

    VERY HIGH

    ID FAN

    RUNNING

    AIR FLOW

    >30%DRUM LEVEL

    VERY LOWPA FAN

    RUNNING

    FURNACE

    PRESSURE

    VERY LOW

    DRUM LEVEL

    VERY HIGH

    30493051 30533048 3032 3033 3050 2301115 3052

    The output coil 2301 is a flag and it is Energized when

    Secondary/Tertiary Fan shall be running that supplies Air flow >30% to Upper layer of Furnace, Primary Fan should also run that

    supplies Air to Lower layer of Furnace.

    The Furnace Pressure and Drum level should be low and ID Fan

    should start running for flue gas to be sent out.

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    B-1 SCANNER

    SHOW FILM

    B-2 SCANNER

    SHOW FILM

    B-3 SCANNER

    SHOW FILM

    B-4 SCANNER

    SHOW FILM

    B1-4 SCANNER

    SHOW FILM

    230230233002 3007 3018

    The Scanner Film is present at Furnace through which the level, floware monitored. So, the I/Ps should remain active low.

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    B-1 HOBV

    CLOSED

    B-2 HOBV

    CLOSED

    B-3 HOBV

    CLOSED

    B-4 HOBV

    CLOSED

    B1-4 HOBV

    CLOSED

    230330223001 3006 3017

    During Purge Ready initially the Furnace is Purged with fresh Air. So,the Header Oil Burner v/vs B1-B4 should be closed.

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    INDUSTRIAL SPECIFICATIONS

    FURNACE TEMP. : 600deg.C(inlet),650deg.C

    FURNACE STEAM: 35TPH

    ECONOMISER TEMP. :

    380deg.C(inlet) , 160deg.C(outlet)

    ESP TEMP. : 160deg.C(inlet),150deg.C(outlet)

    STEAM DRUM WATER LEVEL : 54% SUPER HEATED STEAM TEMP. : +/- 410 deg.C

    CHIMNEY TEMP. : 140 - 150 deg.C

    GREEN LIQUOR OUTLET : 1000 TPH/DAY

    STEAM PRESSURE O/L : 36kg/cm2

    STEAM TEMP. O/L : 410 415 deg.C

    STEAM FLOW O/L : 36 TPH.

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    IMPLEMENTATION

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    Level Control in a Reaction Vessel

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    PLC used in

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    PLC used inLEVEL CONTROL

    PLC WIRING

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    PLC WIRINGDIAGRAM

    The SIEMENS PLC specifications used for Level Control are :

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    pSoftware : STEP 7 LITE.MODEL : S7 30016 Digital Inputs

    4 Analog Inputs16 Digital Outputs9 Relay Outputs2 Analog Outputs

    Q1 : 24 V DC 0.5A MAXThe Inputs and Outputs used in this project are Digital I/O s only.

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    EXPLANATION:

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    In Rung-1 the Switch I0.0 is active high and remaining I/Ps are kept active low. The

    O/Ps of v/v-1 and Pump-1 shall be active high (Q0.0 & Q0.4), a latch of O/P v/v-1is

    given to I0.1 because if Chemical-1crosses I0.1 then I0.1 will become active high and

    O/Ps shall become active low. So, latch is provided for O/Ps to remain active high.In Rung-2 I0.0, I0.1 & I0.2 shall remain active high and O/Psof v/v-2 and Pump-2

    shall be active high (Q0.1 Q0.4) as Chemical-1reaches Medium level, at same instant

    Chemical-2 shall flow to the vessel and Chemical-1 cease to flow.In Rung-3 as Chemical-2 reaches I0.3 Chemical-2 cease to flow, when I0.3 is active

    high then memory O/P of MotorM0.1 is set as M3.1,latch ofM0.1 make Motor to run

    continuously .In Rung-4 I0.0,M0.1are kept active low and O/P of TimerM0.5,memory O/P of Drain

    v/v M3.2 are active low. When M0.5 becomes high Motor stops.In Rung-5 M0.1acts asI/P to ON-Delay Timer, when Timer is activated Agitator

    mixes both Chemicals.M0.5 shall be On after 10 seconds Delay.

    In Rung-6 M0.5 shall be active high making Drain v/v Q0.6 to open with thecondition I0.1be active high.M3.2 is set memory of Drain v/v Q0.6 .Finally in Rung-7 when processed Chemical falls below I0.1 Drain v/v closes and this

    process continues until Start/Stop Switch is pressed.In Rung-8 memory M3.3 &M3.4 are given to M3.1 to become reset because if motor

    stops in middle then manually processed Chemical is drained , if power comes thenmotor resets.

    WORKING :

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    WORKING :

    Initially the Tank shall be Empty.

    When the Start Push Button is pressed the Pump-1 and Inlet v/v-1willbe ON i.e., Chemical-1 shall flow from Pump-1 to Tank.Chemical-1 reaches Minimum/Low Level then it reaches Medium

    Level.As the Mid Level is reached Chemical-1 stops flowing from Pump-1

    and Chemical-2 is supplied by Pump-2 via Inlet v/v-2.When Maximum/High Level is reached by Chemical -2 ,Pump-2 cease

    to supply Chemical-2.Then Motor shall be ON for specified time for mixing of both the

    Chemicals with Agitator that is connected to Motor.When Motor Stops the Outlet v/v will drain the processed Chemical

    mixture Outside.This process continues until Stop Push Button is pressed.

    APPLICATIONS

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    APPLICATIONS :

    Used in Bottling plants.Used in Chemical Industries like Fertilizers, Drugs.

    Used in Paper, Cement Industries .

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    Conclusion:-

    The main theme of this Study project is Purging theFurnace at initial stage and activating the Emergency Trip

    and Drain valves during abnormal conditions while

    continuous running of process.

    This project can be used for better functioning of Boiler

    plant without any malfunctions by continuously

    monitoring the Industrial parameters and protecting the

    Boiler from destruction. PLC requires hardwiring only once and if there

    is any change in wiring , we can easily changeit.

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    50

    Recovery department

    Power block department

    INSTRUMENTATION department

    JKPM Management

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    Authorised By

    SANTOSH BHARADWAJ REDDYEmail: [email protected] Papers and Presentations available on abov

    mailto:[email protected]:[email protected]