A damper for a furnace, the damper including an air port damper body engaged to an air port opening of a furnace; and at least one velocity plate in hinged engagement to the air port damper body so that an air controlling end surface of the at least one velocity plate is substantially aligned to a wall of the furnace at the air port opening when the at least one velocity plate is in a fully opened position.

A method is provided for controlling airflow into a furnace that employs a velocity type damper. In one embodiment, the method for controlling airflow may include engaging a velocity type damper to an air port opening of a furnace. The velocity type damper includes at least one air controlling surface that is positioned proximate to a wall of the furnace at the air port opening so that air velocity exiting the at least one air controlling surface is substantially equal to the air velocity entering the air port opening to the furnace. The method may further include adjusting a cross sectional area through the velocity type damper to control air velocity into the furnace through the air port opening.

A method is provided for controlling airflow into a furnace that employs a velocity type damper. In one embodiment, the method for controlling airflow may include engaging a velocity type damper to an air port opening of a furnace. The velocity type damper includes at least one air controlling surface that is positioned proximate to a wall of the furnace at the air port opening so that air velocity exiting the at least one air controlling surface is substantially equal to the air velocity entering the air port opening to the furnace. The method may further include adjusting a cross sectional area through the velocity type damper to control air velocity into the furnace through the air port opening.

A damper for a furnace, the damper including an air port damper body engaged to an air port opening of a furnace; and at least one velocity plate in hinged engagement to the air port damper body so that an air controlling end surface of the at least one velocity plate is substantially aligned to a wall of the furnace at the air port opening when the at least one velocity plate is in a fully opened position.

A damper for a furnace, the damper including an air port damper body engaged to an air port opening of a furnace; and at least one velocity plate in hinged engagement to the air port damper body so that an air controlling end surface of the at least one velocity plate is substantially aligned to a wall of the furnace at the air port opening when the at least one velocity plate is in a fully opened position.

A process and apparatus for reducing pressure of a flue gas stream including passing a pressurized flue gas stream to a vessel and through a bed of particulates in the vessel to reduce the pressure of the flue gas stream. The flue gas passes from the vessel at a lower pressure than at which it entered. The bed of particulates is disposed in the vessel between the outlet end of the inlet conduit and the inlet end of the outlet conduit. If deposits develop in the bed of particulates, the particulates can be replaced with fresh particulates to avoid excessive pressure drop. Data may be received from a stream in fluid communication with the foregoing process and apparatus.

A process and apparatus for reducing pressure of a flue gas stream including passing a pressurized flue gas stream to a vessel and through a bed of particulates in the vessel to reduce the pressure of the flue gas stream. The flue gas passes from the vessel at a lower pressure than at which it entered. The bed of particulates is disposed in the vessel between the outlet end of the inlet conduit and the inlet end of the outlet conduit. If deposits develop in the bed of particulates, the particulates can be replaced with fresh particulates to avoid excessive pressure drop. Data may be received from a stream in fluid communication with the foregoing process and apparatus.

A hot air blower includes a fuel tank, an air compression pump for compressing air, a pressure regulating valve to decompress the compressed air. The hot air blower also includes a burner assembly and a combustion chamber for receiving fuel from the burner assembly to combust the fuel. The pressure regulating valve includes a high-pressure pressure regulating valve and a low-pressure pressure regulating valve. The low-pressure pressure regulating valve is provided with a low pressure valve opening and closing unit. The low pressure valve opening and closing unit includes a valve body installed communicating with a low pressure discharge port and having an inlet formed in the center of the front portion thereof to communicate with the low pressure discharge port, an outlet formed in the side surface thereof and communicating with the inlet, and an accommodation hole formed therein and communicating with both the inlet and the outlet.

A cooking or baking oven can include a hood having a vent outlet and a cooking chamber having a rack positioned therein. The cooking or baking oven can also include a heating chamber separated from the cooking chamber, a fuel burner, a fuel burner blower operably coupled to the fuel burner, a burner tube having an inlet end and an outlet end, the inlet end coupled to the fuel burner, and a flue having an inlet end coupled to the outlet end of the burner tube and an outlet end coupled to the hood, the flue having an opening. The cooking or baking oven can also include a damping system having a damper lid coupled to the flue, the damper lid moveable between an open position and a closed position, the damper lid in the closed position covering the opening; a damper motor; and a damper arm coupled to the damper lid and the damper motor, the damper motor rotatably moving the damper arm to move the damper lid between the open and closed positions. Related systems and methods are also provided.

A cooking or baking oven can include a hood having a vent outlet and a cooking chamber having a rack positioned therein. The cooking or baking oven can also include a heating chamber separated from the cooking chamber, a fuel burner, a fuel burner blower operably coupled to the fuel burner, a burner tube having an inlet end and an outlet end, the inlet end coupled to the fuel burner, and a flue having an inlet end coupled to the outlet end of the burner tube and an outlet end coupled to the hood, the flue having an opening. The cooking or baking oven can also include a damping system having a damper lid coupled to the flue, the damper lid moveable between an open position and a closed position, the damper lid in the closed position covering the opening; a damper motor; and a damper arm coupled to the damper lid and the damper motor, the damper motor rotatably moving the damper arm to move the damper lid between the open and closed positions. Related systems and methods are also provided.