Method of controlling combustion in fluidized bed incinerator

A combustion control method for application in a fluidized bed incinerator for burning matter to be incinerated charged into a furnace by causing fluidization of a fluidizing medium with the assistance of air fed from a lower portion of a fluidized bed, comprising the steps of:

• detecting a combustion rate of matter to be burnt in said furnace by a detecting means;
• reducing the amount of air fed from the lower portion of said fluidized bed and simultaneously increasing the amount of air blown into a space above said fluidized bed when said combustion rate exceeds a predetermined level;
• and
• restoring the amount of air fed from the lower portion of said fluidized bed to its original value and simultaneously decreasing the amount of air blown into said space above said fluidized bed when said combustion rate decreases below said predetermined level so as to control and maintain said combustion rate of said matter to be burnt in said furnace at said predetermined level.

A combustion control method for application in a fluidized bed incinerator for burning matter to be incinerated charged into a furnace by causing fluidization of a fluidizing medium with the assistance of air fed from a lower portion of a fluidized bed, comprising the steps of:

• providing a detecting means for detecting the amount or volume of said matter to be incinerated charged into said furnace;
• providing a controlling means for controlling a combustion rate based on said amount or said volume of said matter to be incinerated charged into said furnace;
• reducing the amount of air fed from the lower portion of said fluidized bed when said combustion rate of said matter to be incinerated in said furnace exceeds a predetermined level;
• and
• restoring the amount of air fed from the lower portion of said fluidized bed to its original value when said combustion rate decreases below said predetermined level so as to control and maintain said combustion rate of said matter to be incinerated in said furnace at said predetermined level.

A combustion control method for application in a fluidized bed incinerator for burning matter to be incinerated charged into a furnace by causing fluidization of a fluidizing medium with the assistance of air fed from a lower portion of a fluidized bed, comprising the steps of:

• providing a detecting means for detecting the amount or volume of said matter to be incinerated charged into said furnace;
• providing a controlling means for controlling a combustion rate based on said amount or said volume of said matter to be incinerated charged into said furnace;
• reducing the amount of air fed from the lower portion of said fluidized bed and simultaneously increasing the amount of air blown into a space above said fluidized bed when said combustion rate of said matter to be incinerated in said furnace exceeds a predetermined level;
• and
• restoring the amount of air fed from the lower portion of said fluidized bed to its original value and simultaneously reducing the amount of air blown into said space above said fluidized bed when said combustion rate decreases below said predetermined level so as to control and maintain said combustion rate of said matter to be incinerated in said furnace at said predetermined level.

A combustion control method for application in a fluidized bed incinerator for burning matter to be incinerated charged into a furnace by causing fluidization of a fluidizing medium with the assistance of air fed from a lower portion of a fluidized bed, comprising the steps of:

• providing a temperature detecting means for detecting an intra-furnace temperature;
• providing a controlling means for controlling a combustion rate based on said intra-furnace temperature;
• reducing the amount of air fed from the lower portion of said fluidized bed when said combustion rate of said matter to be incinerated in said furnace exceeds a predetermined level;
• and
• restoring the amount of air fed from said lower portion of said fluidized bed to its original value when said combustion rate decreases below said predetermined level so as to control and maintain said combustion rate of said matter to be incinerated in said furnace at said predetermined level.

A combustion control method for application in a fluidized bed incinerator for burning matter to be incinerated charged into a furnace by causing fluidization of a fluidizing medium with the assistance of air fed from a lower portion of a fluidized bed, comprising the steps of:

• providing a temperature detecting means for detecting an intra-furnace temperature;
• providing a controlling means for controlling a combustion rate based on said intra-furnace temperature;
• reducing the amount of air fed from the lower portion of said fluidized bed and simultaneously increasing the amount of air blown into a space above said fluidized bed when the combustion rate of said matter to be incinerated in said furnace exceeds a predetermined level;
• and
• restoring the amount of air fed from the lower portion of said fluidized bed to its original value and simultaneously reducing the amount of air blown into said space above said fluidized bed when said combustion rate decreases below said predetermined level so as to control and maintain said combustion rate of said matter to be incinerated in said furnace at said predetermined level.

A combustion control method for application in a fluidized bed incinerator for burning matter to be incinerated charged into a furnace by causing fluidization of a fluidizing medium with the assistance of air fed from a lower portion of a fluidized bed, comprising the steps of:

• providing an oxygen concentration detecting means for detecting the concentration of oxygen contained in exhaust gas;
• providing a combustion rate controlling means for controlling a combustion rate based on said oxygen concentration in the exhaust gas;
• reducing the amount of air fed from the lower portion of said fluidized bed when said combustion rate of said matter to be incinerated in said furnace exceeds a predetermined level;
• and
• restoring the amount of air fed from said lower portion of said fluidized bed to its original value when said combustion rate decreases below said predetermined level so as to control and maintain said combustion rate of said matter to be incinerated in said furnace at said predetermined level.

A combustion control method for application in a fluidized bed incinerator for burning matter to be incinerated charged into a furnace by causing fluidization of a fluidizing medium with the assistance of air fed from a lower portion of a fluidized bed, comprising the steps of:

• providing an oxygen concentration detecting sensor for detecting the concentration of oxygen contained in exhaust gas;
• providing a combustion rate controlling means for controlling a combustion rate based on the oxygen concentration in the exhaust gas;
• reducing the amount of air fed from the lower portion of said fluidized bed and simultaneously increasing the amount of air blown into a space above said fluidized bed when said combustion rate of said matter to be incinerated in said furnace exceeds a predetermined level;
• and
• restoring the amount of air fed from the lower portion of said fluidized bed to its original value and simultaneously reducing the amount of air blown into said space above said fluidized bed when said combustion rate decreases below said predetermined level so as to control and maintain said combustion rate of said matter to be incinerated in said furnace at said predetermined level.

A combustion control method for application in a fluidized bed incinerator for burning matter to be incinerated charged into a furnace by causing fluidization of a fluidizing medium with the assistance of air fed from a lower portion of a fluidized bed, comprising the steps of:

• providing a pressure detecting means for detecting an intra-furnace pressure;
• providing a combustion rate controlling means for controlling a combustion rate based on the intra-furnace pressure;
• reducing the amount of air fed from the lower portion of said fluidized bed when the combustion rate of matter to be incinerated in said furnace exceeds a predetermined level;
• and
• restoring the amount of air fed from said lower portion of said fluidizing bed to its original value when said combustion rate decreases below said predetermined level so as to control and maintain said combustion rate of said matter to be incinerated in said furnace at said predetermined level.

A combustion control method for application in a fluidized bed incinerator for burning matter to be incinerated charged into a furnace by causing fluidization of a fluidizing medium with the assistance of air fed from a lower portion of a fluidized bed, comprising the steps of:

• providing a pressure detecting means for detecting an intra-furnace pressure;
• providing a combustion rate controlling means for controlling a combustion rate based on the intra-furnace pressure;
• reducing the amount of air fed from the lower portion of said fluidized bed and simultaneously increasing the amount of air blown into a space above said fluidized bed when the combustion rate of said matter to be incinerated in said furnace exceeds a predetermined level;
• and
• restoring the amount of air fed from the lower portion of said fluidized bed to its original value and simultaneously reducing the amount of air blown into said space above said fluidized bed when said combustion rate decreases below said predetermined level so as to control and maintain said combustion rate of said matter to be incinerated in said furnace at said predetermined level.

A combustion control method for application in a fluidized bed incinerator for burning matter to be incinerated charged into a furnace by causing fluidization of a fluidizing medium with the assistance of air fed from a lower portion of a fluidized bed, comprising the steps of:

• providing a controlling a means for controlling combustion rate based on the properties or the like of said matter to be incinerated;
• reducing the amount of air fed from the lower portion of said fluidized bed when the combustion rate of matter to be incinerated in said furnace exceeds a predetermined level;
• and
• restoring the amount of air fed from said lower portion of said fluidizing bed to its original value when said combustion rate decreases below said predetermined level so as to control and maintain said combustion rate of said matter to be incinerated in said furnace at said predetermined level.

A combustion control method for application in a fluidized bed incinerator for burning matter to be incinerated charged into a furnace by causing fluidization of a fluidizing medium with the assistance of air fed from a lower portion of fluidized bed, comprising the steps of:

• providing a controlling means for controlling a combustion rate based on the properties or the like of said matter to be incinerated;
• reducing the amount of air fed from the lower portion of said fluidized bed and simultaneously increasing the amount of air blown into a space above said fluidized bed when the combustion rate of said matter to be incinerated in said furnace exceeds a predetermined level;
• and
• restoring the amount of air fed from the lower portion of said fluidized bed to its original value and simultaneously reducing the amount of air blown into said space above said fluidized bed when said combustion rate decreases below said predetermined level so as to control and maintain said combustion rate of said matter to be incinerated in said furnace at said predetermined level.

A combustion control method for application in a fluidized bed incinerator for burning matter to be incinerated charged into a furnace by causing fluidization of a fluidizing medium with the assistance of air fed from a lower portion of a fluidized bed, comprising the steps of:

• providing a brightness detecting means for detecting an intra-furnace brightness and a pressure detecting means for detecting an intra-furnace pressure;
• providing a combustion rate controlling means for a controlling combustion rate based on the larger of the outputs obtained by said brightness detecting means and said pressure detecting means;
• reducing the amount of air fed from the lower portion of said fluidized bed when the combustion rate of matter to be incinerated in said furnace exceeds a predetermined level;
• and
• restoring the amount of air fed from the lower portion of said fluidized bed to its original value when said combustion rate decreases below said predetermined level so as to control and maintain said combustion rate of said matter to be incinerated in said furnace at said predetermined level.

A combustion control method for application in a fluidized bed incinerator for burning matter to be incinerated charged into a furnace by causing fluidization of a fluidizing medium with the assistance of air fed from a lower portion of a fluidized bed, comprising the steps of:

• providing a brightness detecting means for detecting an intra-furnace brightness and a pressure detecting means for detecting an intra-furnace pressure;
• providing a combustion rate controlling means for a controlling a combustion rate based on the larger of the outputs obtained by the said brightness detecting means and said pressure detecting means;
• reducing the amount of air fed from the lower portion of said fluidized bed and simultaneously increasing the amount of air blown into a space above said fluidized bed when the combustion rate of said matter to be incinerated in said furnace exceeds a predetermined level;
• and
• restoring the amount of air fed from the lower portion of said fluidized bed to its original value and simultaneously reducing the amount of air blown into said space above said fluidized bed when said combustion rate decreases below said predetermined level so as to control and maintain said combustion rate of said matter to be incinerated in said furnace at said predetermined level.