Design Principles of Cross-beam Grates and Their Application in Boiler Auxiliary Production

The cross-beam grate is important equipment in boiler auxiliaries, and its design principles and application directly affect boiler combustion efficiency and emission levels, playing a key role in boiler production.

Design principles

Design must first ensure that fuel burns fully and that furnace temperature stays stable. That means weighing fuel type, fuel particle size and combustion chamber size together, while assessing the effect of high temperature and corrosive gases on the grate so that it has enough durability and stability.

Application in boiler auxiliary production

The cross-beam grate can control the oxygen supply during combustion effectively and so raise combustion efficiency; it can also recover heat from the exhaust gas to improve boiler efficiency further, and it reduces pollutant emissions from combustion, which benefits the environment.

Site applications

The design is already used in practice, including a 45 tonne cross-beam grate site in Colombia and a 20 tonne staged reciprocating grate site in Vietnam, the two arrangements matching different boiler capacities and fuel conditions.