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AUTOMATION of BIOMASS BOILER

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When designing a boiler control application and when defining the combustion control specifications the understanding of the combustion process is a necessity.

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AUTOMATION of BIOMASS BOILER

  1. 1. BASIC BIOMASS BOILER - OVERVIEW M M M M M M M FURNACE BOILER BIOMASS STORAGE FEEDWATER M M M M M M M M M CYCLONE NG BIOGAS FLUE STACK AIR OVERFIRE FAN ID FAN FLUE GASES BIOMASS STORAGE AIR UNDERFIRE FAN M MHIDRAULIC OIL TANK 3 X SCREW CONVEYOR FEEDER 3 X BELT CONVEYOR FEEDER 2 X SCREW CONVEYOR 2 X BELT CONVEYOR STEAM AIR AIR AIR
  2. 2. BASIC BIOMASS BOILER - INTRODUTION When designing a boiler control application and when defining the combustion control specifications the understanding of the combustion process is a necessity. MAIN FEATURE The Boiler example shown here is a Biomass Boiler with 3 Burns: - Biomass + Biogas “ When Biogas is available on site “ or Biomass only. - Natural Gas “ When Biomass is unavailable on site “ + Biogas “ When Biogas is available on site “ or Natural Gas only. NOTE The Biomass type used is woodchip. OPERATING The operating strategy is based on Cost of Fuel. Natural Gas only “ Solution with the higher cost “ Natural Gas + Biogas Biomass only Biomass + Biogas “ Solution with the lowest cost “ FLOW of FUEL = ( FLOW of COMBUSTION AIR * STOICHIOMETRIC AIR / FUEL ) + PERCENTAGE of EXCESS AIR RATIO = ( FLOW of COMBUSTION AIR + FLOW of EXCESS AIR ) / FLOW of FUEL
  3. 3. BASIC BIOMASS BOILER - CONTROL BOILER CONTROL OBJECTIVES BOILER Level Control Loop - Feedwater Pressure Control Loop - Pressure Pressure Control Loop - Steam BIOMASS BURNER Combustion Control Loop - Burner “ Control of relation between Biomass and Combustion Air “ NATURAL GAS BURNER Pressure Control Loop - Natural Gas Line Combustion Control Loop - Burner “ Control of relation between Natural Gas and Combustion Air “ BIOGAS BURNER Pressure Control Loop - Biogas Line Combustion Control Loop - Burner “ Control of relation between Biogas and Combustion Air “ BELT CONVEYOR FEED Speed Control Loop
  4. 4. PLC BASIC BIOMASS BOILER - AUTOMATION IHM OPERAÇÃO REMOTA IHM OPERAÇÃO LOCAL ETHERNET-IP ETHERNET-IP IHM GN MODBUS - RTU IHM BIOGAS ETHERNET-IP M IFD M IFD M IFD M IFD M IFD M IFD DAMPER AR I/P DESCARGA FUNDOS I/P ASAS DESCARGA FUNDOS I/P AS CPU COMM COMM COMM IOmodule IOmodule IOmodule IOmodule DAMPER AR M VALVULA GN M PROGRAMADOR CHAMA DAMPER AR M VALVULA BIOGAS M PROGRAMADOR CHAMA PAINEL PLC CCM

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