A flue gas treatment system and process for tft kiln glass kiln

Abstract

The invention discloses a flue gas treatment system for a TFT glass kiln, which comprises a flue gas conditioning device, a metal membrane dust collector, an SCR system, and a water film connected in sequence for cooling and debonding the flue gas. Dust collector, fan and chimney; a urea spraying system is installed on the flue connected to the flue gas conditioning device, a sensor for monitoring the composition of the flue gas is installed on the flue, and a urea dissolving system for dissolving urea to form an aqueous urea solution is also included; The flue gas treatment process includes the following process. After the flue gas is tempered, it is sprayed with urea in the flue to cool down, dust is removed by the metal membrane dust collector, denitrification is performed by the SCR system, dust is removed by the water film, and the flue gas is discharged to the chimney through the fan; there is no need to carry out the flue gas Repeated cooling and heating can effectively reduce energy consumption, and the flue gas emission is stable up to the standard. After SCR denitrification, the water film dust collector is used to remove dust to absorb the escaping ammonia gas. No spray cooling is used to reduce the use of water and reduce the Flue gas treatment costs.

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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