Abstract: A process and system for automated online fouling prevention of vertical shell and tube gas-to-gas heat exchangers is provided. The process and system of the invention utilize the flow velocity of the gas within the tubes to facilitate cleaning of the tubes by adding, when necessary, grit to the contaminated gas flow.

Abstract: A furrow closing unit for a planting unit includes a frame adapted to be pivotally coupled with the planting unit, and a pair of coulter blades rotatably attached to the frame and adapted to move soil into a seed groove to facilitate a closing of the seed groove. The furrow closing unit further includes a basket assembly fixedly attached to the frame and having a basket adapted to roll over a soil surface behind the pair of coulter blades. The basket includes a pair of end caps and a plurality of spokes extending between the pair of end caps. The plurality of spokes is arrayed circularly around a central axis of the basket and is arranged spaced apart from each other.

Abstract: A dual-placement fertilizer system for applying fertilizer at the base of crops and attached to a single coulter fertilizer system is provided. The system includes mounting means for attaching to the single coulter fertilizer system. A pivot plate is pivotally connected to the mounting means. The pivotal connection may be accomplished through a cylindrical sleeve affixed to a trailing edge of the second section of the mounting bracket, and a pivot pin extending through the cylindrical sleeve and having a first end affixed to the pivot plate for permitting the pivot plate to oscillate relative to the mounting bracket. First and second fertilizer supply lines, each having a first end affixed to the pivot plate, extend outwardly from the pivot plate in substantially opposing direction relative to one another to a second open end for dispersing liquid fertilizer at the base of crops.