Flue gas treatment system and technology for TFT glass kiln

Abstract

The invention discloses a flue gas treatment system for a TFT glass kiln. The flue gas treatment system comprises a flue gas conditioning device for cooling and debonding flue gas, a metal film-type dust remover, an SCR system, a water film-type dust remover, a fan and a chimney which are sequentially communicated, wherein a urea sprinkling system is arranged on a flue communicated with the flue gas conditioning device; a sensor for monitoring components of the flue gas is arranged on the flue; the flue gas treatment system further comprises a urea dissolving system for dissolving urea into anaqueous urea solution. A flue gas treatment technology comprises the following flow path: after the flue gas is conditioned, the flue gas is cooled through urea sprinkling in the flue, dedusted through the metal film-type dust remover, denitrated through the SCR system, dedusted through a water film and discharged through the fan from the chimney. Repeated cooling and heating of the flue gas arenot required, so that the energy consumption is effectively lowered; the flue gas discharge is stable and meets the standard; after SCR denitration, through dust removal of the water film-type dust remover, escaped ammonia gas is absorbed and sprinkling cooling is not adopted, so that use of water is reduced and the flue gas treatment cost is reduced.

Description

technical field [0001] The invention belongs to the field of kiln flue gas treatment, and in particular relates to a flue gas treatment system and process for a TFT kiln glass kiln. Background technique [0002] In the production process of TFT substrate glass, the flue gas treatment process domestic smoke exhaust process: kiln flue gas - flue gas conditioning (flue gas conditioning equipment) - urea spraying (urea melting system) - SCR - Water film dust removal - fan - chimney. [0003] Fume exhaust process of Japan and Corning Corporation of the United States: kiln flue gas --- flue gas spray cooling (NaOH melting system) -- electrostatic dust removal -- flue gas heating --- urea spraying (urea melting system) -- SCR - Bag dust collector - fan - chimney. [0004] Before passing through the bag filter, the flue gas needs to be sprayed with water to cool down. After the water spraying, the flue gas will stick to the bag filter and other equipment due to its high humidity. ...

AI Technical Summary

Problems solved by technology

[0004] Before passing through the bag filter, the flue gas needs to be sprayed with water to cool down. After the water spraying, the flue gas will stick to the bag filter and other equipment due to its high humidity. Remove moisture first, then heat up, high energy consumption, long treatment cycle, the current flue gas treatment process also needs to spray the flue gas with water before the water film dust removal, absorbing ammonia gas, which requires a lot of additional water resources

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