Abstract: Apparatus for separating ash particles from a flue gas. The apparatus includes a screen that has a plurality of semi-elliptical cylinder surfaces. The semi-elliptical cylinder surfaces having holes through which said flue gas flows and through which the ash particles will not pass. The screen has a single layer for performing the separation in a manner such that the ash particles fall away from the screen and collect outside of the screen. A method of reducing velocity of a flue gas passing through screening apparatus for separating flue gas from ash particles. The method includes replacing a first screen of the screening apparatus with a second screen that has a plurality of semi-elliptical cylinder surfaces.

Abstract: Apparatus for separating ash particles from a flue gas. The apparatus includes a screen that has a plurality of semi-elliptical cylinder surfaces. The semi-elliptical cylinder surfaces having holes through which said flue gas flows and through which the ash particles will not pass. The screen has a single layer for performing the separation in a manner such that the ash particles fall away from the screen and collect outside of the screen. A method of reducing velocity of a flue gas passing through screening apparatus for separating flue gas from ash particles. The method includes replacing a first screen of the screening apparatus with a second screen that has a plurality of semi-elliptical cylinder surfaces.

Abstract: Apparatus for separating ash particles from a flue gas. The apparatus includes a screen that has a plurality of semi-elliptical cylinder surfaces. The semi-elliptical cylinder surfaces having holes through which said flue gas flows and through which the ash particles will not pass. The screen has a single layer for performing the separation in a manner such that the ash particles fall away from the screen and collect outside of the screen. A method of reducing velocity of a flue gas passing through screening apparatus for separating flue gas from ash particles. The method includes replacing a first screen of the screening apparatus with a second screen that has a plurality of semi-elliptical cylinder surfaces.

Abstract: Apparatus for separating ash particles from a flue gas. The apparatus includes a screen that has a plurality of semi-elliptical cylinder surfaces. The semi-elliptical cylinder surfaces having holes through which said flue gas flows and through which the ash particles will not pass. The screen has a single layer for performing the separation in a manner such that the ash particles fall away from the screen and collect outside of the screen. A method of reducing velocity of a flue gas passing through screening apparatus for separating flue gas from ash particles. The method includes replacing a first screen of the screening apparatus with a second screen that has a plurality of semi-elliptical cylinder surfaces.

Abstract: Apparatus for separating ash particles from a flue gas. The apparatus includes a screen that has a plurality of semi-elliptical cylinder surfaces. The semi-elliptical cylinder surfaces having holes through which said flue gas flows and through which the ash particles will not pass. The screen has a single layer for performing the separation in a manner such that the ash particles fall away from the screen and collect outside of the screen. A method of reducing velocity of a flue gas passing through screening apparatus for separating flue gas from ash particles. The method includes replacing a first screen of the screening apparatus with a second screen that has a plurality of semi-elliptical cylinder surfaces.

Abstract: A filter cartridge which includes a filter medium having a cylindrical segment shape and a channel disposed within the filter medium for receiving fluid filtered through the filter medium. A method of increasing a filter medium surface area of a filter or lowering pressure drop across the filter that has a plurality of filter cartridges disposed in a filter vessel. The method includes removing at least one filter cartridge from the filter vessel and replacing the removed filter cartridge with a filter cartridge that includes a filter medium having a cylindrical segment shape. The latter filter cartridge also includes a channel disposed within the filter medium for receiving fluid filtered through the filter medium.

Abstract: Apparatus for separating ash particles from a flue gas. The apparatus includes a screen that has a plurality of semi-elliptical cylinder surfaces. The semi-elliptical cylinder surfaces having holes through which said flue gas flows and through which the ash particles will not pass. The screen has a single layer for performing the separation in a manner such that the ash particles fall away from the screen and collect outside of the screen. A method of reducing velocity of a flue gas passing through screening apparatus for separating flue gas from ash particles. The method includes replacing a first screen of the screening apparatus with a second screen that has a plurality of semi-elliptical cylinder surfaces.

Abstract: A vaporizer including injection lances disposed within a vessel for injecting a substance such as liquid or heating media, into the vessel. The lances are configured for removal from the vessel through at least one of multiple orifices in the wall of the vessel. The orifices are configured to have lances extending through them into the vessel. The configuration of the vaporizer facilitates performing maintenance or making changes to the lances without the need to take the vaporizer out of service.

Abstract: A filter cartridge which includes a filter medium having a cylindrical segment shape and a channel disposed within the filter medium for receiving fluid filtered through the filter medium. A method of increasing a filter medium surface area of a filter or lowering pressure drop across the filter that has a plurality of filter cartridges disposed in a filter vessel. The method includes removing at least one filter cartridge from the filter vessel and replacing the removed filter cartridge with a filter cartridge that includes a filter medium having a cylindrical segment shape. The latter filter cartridge also includes a channel disposed within the filter medium for receiving fluid filtered through the filter medium.

Abstract: A selective catalytic reduction (SCR) system is defined that uses the measured concentration of reactant slip in the exhaust gas after SCR processing to control the amount of reactant injected during non-steady-state operational conditions. The SCR system works with a reactant slip detector located in the post-SCR processing section of the exhaust flue. The reactant slip detector measures the concentration of reactant in the exhaust gases and, based on that concentration, the amount of reactant injected into the pre-SCR processing exhaust gases is controlled.

Abstract: An integrated exhaust gas cooling system and method, including an expansion joint linking the system to an upstream source of exhaust gas and a pre-oxidation section through which exhaust gas travels. A hot temperature zone in which the exhaust gas is maintained at a temperature optimal for an oxidation process extends through the pre-oxidation section. An oxidation catalyst in the hot temperature zone is provided. The exhaust gas passes through the oxidation catalyst. Oxidized exhaust gas passes a post-oxidation section downstream of the oxidation catalyst. A tempering air stream is injected into the post-oxidation section to create a cool temperature zone in which the oxidized exhaust gas is cooled below the temperature in the hot temperature zone and to a temperature optimal for a reduction process. The system includes a reduction catalyst in the cool temperature zone through which the oxidized exhaust gas passes.

Abstract: An integrated exhaust gas cooling system and method, including an expansion joint linking the system to an upstream source of exhaust gas and a pre-oxidation section through which exhaust gas travels. A hot temperature zone in which the exhaust gas is maintained at a temperature optimal for an oxidation process extends through the pre-oxidation section. An oxidation catalyst in the hot temperature zone is provided. The exhaust gas passes through the oxidation catalyst. Oxidized exhaust gas passes a post-oxidation section downstream of the oxidation catalyst. A tempering air stream is injected into the post-oxidation section to create a cool temperature zone in which the oxidized exhaust gas is cooled below the temperature in the hot temperature zone and to a temperature optimal for a reduction process. The system includes a reduction catalyst in the cool temperature zone through which the oxidized exhaust gas passes.