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 ?
Additionally, the company received an order for a conventional Selective Catalytic Reduction (SCR) system on an industrial gas-fired boiler at a fertiliser production facility in the US, together with the SCR reactor, flow mixing devices, ammonia injection grid and aqueous ammonia feed system.
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.
The design includes an SCR reactor, catalyst supply and ammonia injection grid, each of which is critical for optimal SCR performance.