Waste Heat Recovery Technology of Glass Electric Melting Furnace Flue Gas


Accordingglass electric melting furnaceAfter repeated design and comparison, the technical scheme of combining radiation water cooling sedimentation dust removal and convective heat transfer was finally selected after comprehensive consideration of the process characteristics, the placement of the site space, the resistance of the flue gas system and the ash content. The main equipment includes water-cooled settling chamber, high temperature evaporator, superheater, medium and low temperature evaporator, economizer, heater and related systems.

(1) Setting of flue gas waste heat recovery system

Firstly, a set of radiation water wall settling section is designed in front of the existing secondary combustion chamber outlet, and then a set of convection heat transfer section is designed under the original flue gas pipeline after passing through 90 ° rotation angle. The temperature of the high-temperature flue gas coming out from the secondary combustion chamber can be preliminarily integrated by using the radiation water wall assembly in the first set of heating surface, and meanwhile the velocity of the flue gas can be reduced to complete the preliminary settling of large dust particles in the flue gas, in order to reduce the load of the subsequent boiler and dust removal device, at the same time, the gas in the flue gas is not fully burned in the settling chamber to continue to react and burn thoroughly, so as to avoid the impact of explosion damage to the subsequent equipment or device, and play the role of peak cutting of high temperature flue gas.

The flue gas enters the waste heat boiler after passing through the water-cooled settling chamber. The waste heat boiler body is horizontally arranged according to the actual situation on site. The high-temperature flue gas passes through the high-temperature evaporator, superheater, medium and low-temperature evaporator, economizer and heat exchanger in turn (resistant to low-temperature dew point corrosion). The finally discharged flue gas is purified by the dust collector and then discharged to the atmosphere.

(2) Steam recovery system with heat accumulator

Dueglass electric melting furnaceFor periodic intermittent blowing, two regenerators are added to the steam system. Its function is to continuously and stably supply steam to the outside through the regulation of the heat accumulator, so that the steam can be recovered and utilized to the maximum extent.

1 Chang 6MPa saturated steam can be generated through the waste heat boiler. After passing through the heat accumulator, 1 Chang 1MPa saturated steam is supplied back to the superheater of the boiler body to realize basically stable output. Steam after heat can reach 260~350 ℃ and into the main steam pipe network.


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