Abstract:
Methods and systems for reducing emissions produced in a combustion system are described. A sorbent material is introduced into the emission gases flowing from the combustion system. Sound waves are also applied to the emission gases in the flow path. The sound waves can be introduced into the emission gas flow path at a location upstream from where the sorbent is introduced into the emission gas flow path. The sound waves can also be introduced into the emission gas flow path such that the sound waves travel in a downstream direction in the flow path. The emissions can include Hg and acid gases such as SO2. The sorbent material can be trona or activated carbon. The sound waves enhance mixing of and mass transfer between the sorbent and pollutants in the gas thereby reducing the amount of sorbent necessary to reduce harmful emissions.
Abstract:
A variable flow device that can be used to dewater an ash slurry is described. The variable flow device includes a pipe section having a plurality of adjustable openings in the sidewall. The variable flow device can be can be attached to a slurry discharge pipe and positioned above the horizontal section of a submerged scraper conveyor (SSC) located remotely from a boiler or furnace where bottom ash is generated. A bottom ash dewatering system is also described which includes an SSC having an overflow trough system. The trough system includes trough sections adjacent each of the sides of the SSC and one or more trough connecting sections. The SSC equipped with the variable flow device and/or trough system can receive a high volume wet ash slurry discharge while minimizing particulates overflowing into the overflow trough system.
Abstract:
A sootblower having a nozzle that includes one or more deep reaching jets aligned with its respective platen bank to clean slag deposits inset from the leading edge of the platen bank. The nozzle also includes one or more edge cleaning jets substantially angled with respect to the platen bank for cleaning the leading edges of the platen bank. For most applications, the major axis of the sootblower is perpendicular to the major axis of its respective platen bank, resulting in a sootblower with a nozzle having angled and perpendicular jets, referred to as angled-perpendicular nozzles. The jet sizes are selected to balance the opposing components of force perpendicular to the sootblower to avoid the imposition of torque on the lance.
Abstract:
A modular design for large pulse jet fabric filters (PJFF) is divided into similar compartments, which are each “shop-fabricated” in quarter sections prior to delivery to the power plant site. The quarter sections of the compartments are modular and sized so that they can be fabricated at a shop located away from the power plant site and transported by truck over public roads to the power plant site. Once delivered to the site, the quarter sections are bolted together and seal welded to form a PJFF compartment, without requiring additional internal fabrication or welding. The assembled compartment is then lifted onto the support structure as an assembled unit and bolted and/or welded in place. The additional components of the PJFF may also be shop-fabricated offsite to further the benefits of the modular design.
Abstract:
A modular design for large pulse jet fabric filters (PJFF) is divided into similar compartments, which are each “shop-fabricated” in quarter sections prior to delivery to the power plant site. The quarter sections of the compartments are modular and sized so that they can be fabricated at a shop located away from the power plant site and transported by truck over public roads to the power plant site. Once delivered to the site, the quarter sections are bolted together and seal welded to form a PJFF compartment, without requiring additional internal fabrication or welding. The assembled compartment is then lifted onto the support structure as an assembled unit and bolted and/or welded in place. The additional components of the PJFF may also be shop-fabricated offsite to further the benefits of the modular design.
Abstract:
A sootblower having a nozzle that includes one or more deep reaching jets aligned with its respective platen bank to clean slag deposits inset from the leading edge of the platen bank. The nozzle also includes one or more edge cleaning jets substantially angled with respect to the platen bank for cleaning the leading edges of the platen bank. For most applications, the major axis of the sootblower is perpendicular to the major axis of its respective platen bank, resulting in a sootblower with a nozzle having angled and perpendicular jets, referred to as angled-perpendicular nozzles. The jet sizes are selected to balance the opposing components of force perpendicular to the sootblower to avoid the imposition of torque on the lance.
Abstract:
A modular design for large pulse jet fabric filters (PJFF) is divided into similar compartments, which are each “shop-fabricated” in quarter sections prior to delivery to the power plant site. The quarter sections of the compartments are modular and sized so that they can be fabricated at a shop located away from the power plant site and transported by truck over public roads to the power plant site. Once delivered to the site, the quarter sections are bolted together and seal welded to form a PJFF compartment, without requiring additional internal fabrication or welding. The assembled compartment is then lifted onto the support structure as an assembled unit and bolted and/or welded in place. The additional components of the PJFF may also be shop-fabricated offsite to further the benefits of the modular design.