Incineration control apparatus for a fluidized bed boiler

An incineration control apparatus for a fluidized bed type boiler comprising:

• an incineration chamber (3) filled with fluidizing medium for incinerating combustibles in said fluidizing medium;
• combustibles supply means (14) for supplying a specified amount of combustibles to said incineration chamber (3);
• incineration air supply means (5, 5a, 6, 7) for supplying incineration air to said incineration chamber (3);
• a boiler drum (17) for receiving heat from said incineration chamber (3);
• a heat recovery chamber (4) adjacent to said incineration chamber (3) and so defined that said fluidizing medium in said incineration chamber (3) may be circulated therethrough;
• heat recovery air supply means (6a, 8, 8a, 8a', 8b) for supplying heat recovery air to said heat recovery chamber (4) at a specified air velocity (or mass velocity);
• heat recovery means (10, 11) provided in said heat recovery chamber (4) for recovering and transferring the heat in said fluidizing medium circulating through said heat recovery chamber (4) to said boiler drum (17) in accordance with the specified velocity (or mass velocity) of the heat recovery air;
• steam pressure detecting means (20b) for detecting the steam pressure in said boiler drum (17) and for outputting a steam pressure signal (PV01) indicating said steam pressure;
• combustibles supply control means (31) for controlling the amount of combustibles supplied by combustibles supply means (14) in response to said steam pressure signal (PV01);
• temperature detecting means (3a) for detecting the temperature in said incineration chamber (3) and for outputting a temperature signal (PV02) indicating said temperature;
• heat recovery air supply control means (33, 34, 9, 9a, 9b) for controlling the velocity (or mass velocity) of heat recovery air at said heat recovery air supply means (6a, 8, 8a, 8a', 8b) in response to said temperature signal (PV02) such as to cause temperature indicated by said temperature signal to coincide with a specified temperature set value;
• and
• temperature set value control means (32) for controlling a temperature set value at the heat recovery air supply control means (33, 34, 9, 9a, 9b) in unison with control of the amount of combustibles supplied by said combustibles supply means (14) which is controlled by said combustibles supply control means (31).

An incineration control apparatus for a fluidized bed type boiler comprising:

• an incineration chamber (3) filled with fluidizing medium for incinerating combustibles in said fluidizing medium;
• combustibles supply means (14) for supplying a specified amount of combustibles to said incineration chamber (3);
• incineration air supply means (5, 5a, 6, 7) for supplying incineration air to said incineration chamber (3);
• a boiler drum (17) for receiving heat from said incineration chamber (3);
• a heat recovery chamber (4) adjacent to said incineration chamber (3) and so defined that said fluidizing medium in said incineration chamber (3) may be circulated therethrough;
• heat recovery air supply means (6a, 8, 8a, 8a', 8b) for supplying heat recovery air to said heat recovery chamber (4) at a specified air velocity (or mass velocity);
• heat recovery means (10, 11) disposed in said heat recovery chamber (4) for recovering and transferring the heat in said fluidizing medium circulating through said heat recovery chamber (4) to said boiler drum (17) in accordance with the specified velocity (or mass velocity) of the heat recovery air;
• steam pressure detecting means (20b) for detecting the steam pressure in said boiler drum (17) and for outputting a steam pressure signal (PV01) indicating said steam pressure;
• combustibles supply control means (31) for controlling the amount of combustibles supplied by said combustibles supply means (14) in response to said steam pressure signal (PV01);
• temperature detecting means (3a) for detecting the temperature in said incineration chamber (3) and for outputting a temperature signal (PV02) indicating said temperature;
• heat recovery air supply control means (33, 34, 9, 9a, 9b) for controlling the velocity (or mass velocity) of heat recovery air at said heat recovery air supply means (6a, 8, 8a, 8a', 8b) in response to said temperature signal (PV02) such as to cause temperature indicated by said temperature signal to coincide with a specified temperature set value;
• temperature set value control means (32) for controlling a temperature set value at said heat recovery air supply control means (33, 34, 9, 9a, 9b) in unison with control of the amount of combustibles supplied by said combustibles supply means (14) which is controlled by said combustibles supply control means (31);
• steam flow rate detecting means (20a) for detecting flow rate of the steam from said boiler drum (17) to a steam load and for outputting a steam flow rate signal (PV04) indicating said flow rate;
• and
• steam load dependent combustibles supply control means (35) for controlling the amount of combustibles supplied by the combustibles supply means (14) depending on the flow rate of steam indicated by said steam flow rate signal (PV04) depending on the steam load in addition to control by said combustible supply control means (31) for controlling the amount of combustibles supplied by said combustibles supply means (14).

An incineration control apparatus for a fluidized bed type boiler comprising:

• an incineration chamber (3) filled with fluidizing medium for incinerating combustibles in said fluidizing medium;
• combustibles supply means (14) for supplying a specified amount of combustibles to said incineration chamber (3);
• incineration air supply means (5, 5a, 6, 7) for supplying incineration air at a specified air velocity (or mass velocity) to said incineration chamber (3);
• a boiler drum (17) for receiving heat from said incineration chamber (3);
• a heat recovery chamber (4) adjacent to said incineration chamber (3) and so defined that said fluidizing medium in said incineration chamber (3) may be circulated therethrough;
• heat recovery air supply means (6a, 8, 8a, 8a', 8b) for supplying heat recovery air to said heat recovery chamber (4) at a specified air velocity (or mass velocity);
• heat recovery means (10, 11) provided in said heat recovery chamber (4) for recovering and transferring the heat in said fluidizing medium circulating through said heat recovery chamber (4) to said boiler drum (17) in accordance with the specified velocity (or mass velocity) of the heat recovery air;
• steam pressure detecting means (20b) for detecting the steam pressure in said boiler drum (17) and for outputting a steam pressure signal (PV01) indicating said steam pressure;
• combustibles supply control means (31) for controlling the amount of combustibles supplied by said combustibles supply means (14) in response to said steam pressure signal (PV01);
• temperature detecting means (3a) for detecting the temperature in said incineration chamber (3) and for outputting a temperature signal (PV02) indicating said temperature;
• heat recovery air supply control means (33, 34, 9, 9a, 9b) for controlling the air velocity (or mass velocity) for heat recovery at said heat recovery air supply means (6a, 8, 8a, 8a', 8b) in response to said temperature signal (PV02) such as to cause the temperature indicated by said temperature signal to coincide with a specified temperature set value;
• temperature set value control means (32) for controlling a temperature set value at the heat recovery air supply control means (33, 34, 9, 9a, 9b) in unison with control of the amount of combustibles supplied by said combustibles supply means (14) which is controlled by said combustibles supply control means (31);
• steam flow rate detecting means (20a) for detecting flow rate of the steam supplied from said boiler drum (17) to a steam load and for outputting a steam flow rate signal (PV04) indicating said flow rate;
• steam load dependent combustibles supply control means (35) for controlling the amount of combustibles supplied by said combustibles supply means (14) in accordance with the flow rate of steam indicated by said steam flow rate signal (PV04) in accordance with the steam load in addition to control by said combustibles supply control means (31) which controls the amount of said combustibles supplied by said combustibles supply means (14);
• and
• incineration air supply control means (7, 36, 37, 38) for controlling the velocity (or mass velocity) of incineration air at said incineration air supply means (5, 5a, 6, 7), in unison with control of the amount of combustibles supplied by said combustibles supply means (14) under the control by said combustibles supply control means (31) and said steam load dependent combustibles supply control means (35).