injection grid

injection grid

[in′jek·shən ‚grid]
(electronics)
Grid introduced into a vacuum tube in such a way that it exercises control over the electron stream without causing interaction between the screen grid and control grid.
References in periodicals archive ?
Fuel Tech also provides a range of combustion optimization services, including airflow testing, coal flow testing and boiler tuning, as well as services to help optimize selective catalytic reduction system performance, including catalyst management services and ammonia injection grid tuning.
Fuel Tech's newly expanded capabilities in SCR-related design, acquired in connection with the asset acquisitions of Tackticks, LLC and FlowTack, LLC, is reflected in the multitude of assignments completed at this client facility, including: consulting on ductwork design; designing flow distribution devices such as turning vanes, a static mixer and the GSG; designing the Large Particle Ash (LPA) collection screen and the ammonia injection grid (AIG); designing the ammonia injection upstream of the electrostatic precipitators for better fly ash removal; and performing computational fluid dynamics (CFD) and experimental models to validate these designs.
The Company also provides a range of combustion optimization services, including airflow testing, coal flow testing and boiler tuning, as well as services to help optimize selective catalytic reduction system performance, including catalyst management services and ammonia injection grid tuning.