Submerged combustion melting exhaust systems

A submerged combustion melting system, comprising:

• a submerged combustion melting furnace, including:
• a tank including a floor, a roof, a perimeter wall extending between the floor and the roof, and an interior,
• submerged combustion melting burners extending through the tank to melt glass feedstock into molten glass in the interior of the tank,
• a batch inlet at an upstream end of the tank,
• a molten glass outlet at a downstream end of the tank, and
• an exhaust outlet in the roof of the tank;
• and
• an exhaust system in fluid communication with the interior of the tank, and including:
• a fluid-cooled flue in fluid communication with the exhaust outlet, and having fluid-cooled perimeter panels including:
• a lower vertical segment in fluid communication with the exhaust outlet of the roof of the tank of the submerged combustion melting furnace and having a lower central longitudinal vertical axis,
• an upper vertical segment having an upper central longitudinal vertical axis and a flue outlet, and
• an intermediate oblique segment extending between the lower and upper vertical segments and having an intermediate central longitudinal oblique axis, wherein an offset distance between the lower and upper central longitudinal axes is greater than or equal to a transit section dimension of the fluid-cooled flue,
• a refractory-lined hood in fluid communication with the fluid-cooled flue, and including a vertical portion downstream of and extending upwardly from the fluid-cooled flue along the upper central longitudinal vertical axis and a horizontal portion downstream of and extending away from the vertical portion to a hood outlet, and including refractory-lined walls and a dilution air duct inlet extending through at least one of the perimeter walls of the horizontal portion, and
• a dilution air input duct having an outlet in fluid communication with the dilution air duct inlet of the refractory-lined hood,
• wherein the horizontal portion includes a lower wall with a protrusion that protrudes into a downstream horizontal exhaust path within the horizontal portion and has an excurvate upper surface to streamline flow of exhaust gas through the refractory-lined hood to prevent gas recirculation and formation of condensate piles in the refractory-lined hood.

A submerged combustion melting system, comprising:

• a submerged combustion melting furnace, including:
• a tank including a floor, a roof, and a perimeter wall extending between the floor and the roof,
• submerged combustion melting burners extending through the tank to melt glass feedstock into molten glass,
• a batch inlet at an upstream end of the tank,
• a molten glass outlet at a downstream end of the tank, and
• an exhaust outlet;
• and
• an exhaust system in fluid communication with the exhaust outlet of the tank, and including:
• a fluid-cooled flue in fluid communication with the exhaust outlet, extending along a central longitudinal axis, and including:
• fluid-cooled perimeter panels,
• a liquid-cooled lower baffle extending at an oblique angle and intersecting the central longitudinal axis, and
• a liquid-cooled upper baffle extending at another angle different from the oblique angle of the liquid-cooled lower baffle and intersecting the central longitudinal axis such that the baffles overlap one another in a lateral direction perpendicular to the central longitudinal axis.

A submerged combustion melting system, comprising:

• a submerged combustion melting furnace, including:
• a tank including a floor, a roof, a perimeter wall extending between the floor and the roof, and an interior,
• submerged combustion melting burners extending through the tank to melt glass feedstock into molten glass in the interior of the tank,
• a batch inlet at an upstream end of the tank,
• a molten glass outlet at a downstream end of the tank, and
• an exhaust outlet;
• and
• an exhaust system in fluid communication with the interior of the tank, and including:
• a flue in fluid communication with the exhaust outlet, and
• a hood in fluid communication with the flue and including:
• a vertical portion downstream of and extending upwardly from the flue, and
• a horizontal portion downstream of and extending away from the upstream vertical portion to establish a downstream horizontal exhaust path within the horizontal portion having an exhaust hood outlet, and including a lower wall with a protrusion that protrudes into the downstream horizontal exhaust path and has an excurvate upper surface to streamline flow of exhaust gas through the hood to prevent gas recirculation and formation of condensate piles in the hood.