Dampers for Glass Melting Furnaces

The process

Container and float glass furnaces burn fuel with combustion air through regenerators or recuperators and exhaust a hot gas with batch carry-over and condensing sulphates. Combustion air blowers at steady pressure, dilution air ahead of the filter, cooling air on the furnace steel, and high pressure blowers for forming and annealing.

The gas

Regenerator exhaust is very hot and carries batch dust with sulphates that condense as the gas cools. Dilution or cooling precedes the filter, and the fan material resists the condensing species.

Selection for this process

Type	Guillotine for isolation, multi louver or butterfly for control, diverter where the gas is switched between two paths
Material	SS 310 or SS 316 for gas above 300°C or corrosive
Sealing	Seal air arrangement where tight shut-off is needed on hot or dusty gas

Types, construction and performance of the dampers.

Industries

Fans in glass melting furnaces

Dampers in other processes

Information needed to select or quote

1. Gas volume and temperature. Actual flow at the inlet, normal and upset temperature, moisture.
2. Dust or pollutant. Inlet loading, particle size distribution, whether it is abrasive, sticky, hygroscopic or combustible; for gases, the species and concentration.
3. Required outlet. The emission limit or clean gas concentration the unit must meet.
4. Site. Available space and height, material of construction preferences, and how the collected material is to be discharged.