Flue gas dedusting of the hottest glass furnace

2022-07-24
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Glass furnace flue gas dust removal

particularity of glass furnace flue gas treatment

mirabilite, soda ash, etc. should be added in the glass production process, resulting in very complex flue gas composition, which has a great impact on denitration, desulfurization and dust removal; Second, most glass production lines use inferior fuels such as petroleum coke powder. The flue gas generated by petroleum coke powder fuel aggravates the difficulty of flue gas treatment, especially denitration. Third, dynamic furnace fire change. Change the fire of the glass kiln every 15 to 20 minutes. During the change of fire, sulfur dioxide, particulate matter and nitrogen oxides will change dramatically. Fourth, kiln pressure balance. In the process of glass production, the stability of kiln pressure is very important. However, the whole set of desulfurization, denitration and dust removal equipment are set at the tail of the kiln flue gas. Once they cannot be accurately designed, the kiln pressure balance will be affected, resulting in glass quality defects and even the scrapping of the whole kiln glass. Fifth, the concentration of nitrogen oxides is high. Generally speaking, the nitrogen oxide concentration of glass furnace should be above 2000mg/nm3

main features of glass furnace flue gas:

high flue gas temperature, moderate flue gas flow, high SO2 content in flue gas and low dust content. During the engineering design of flue gas treatment, it is required to have high desulfurization efficiency and certain dust removal efficiency; Low investment cost and desulfurization cost; The floor area shall be small; The process shall be mature, and the operation shall be stable and reliable to avoid adverse impact on the kiln pressure of glass furnace. The treatment and utilization of flue gas from float glass furnace through medium and low temperature flue gas waste heat power generation technology and double alkali desulfurization technology is fully in line with the national energy conservation and environmental protection policy, technically feasible, and it is economically reasonable that the compound micro material is usually transparent or translucent. The two technologies complement each other: on the one hand, the temperature of flue gas is reduced through waste heat utilization, which provides certain conditions for desulfurization treatment; On the other hand, the economic benefit of waste heat power generation is considerable, which provides financial guarantee for flue gas treatment

dry desulfurization is carried out in a completely dry state without liquid phase intervention, and the desulfurization product is dry powder. Common dry methods include calcium injection in the furnace (cement reaction with higher lime/limestone temperature is more sensitive), metal absorption, etc. Dry desulfurization is a traditional process, and its desulfurization rate is generally not high (50%), and its industrial application is less

half of the world's highest quality dry desulfurization is to use the sensible heat of flue gas to evaporate the water in the desulfurization slurry. At the same time, during the drying process, the desulfurizer reacts with SO2 in the flue gas, and the final product is dry powder. This method is called semi dry method because the desulfurizer added to the system is wet and the desulfurized product from the system is dry. Spray drying flue gas desulfurization, circulating fluidized bed flue gas desulfurization (CFB-FGD) and humidified ash circulating flue gas desulfurization (NID) are widely used in semi dry process. When semi dry desulfurization is adopted, the utilization rate of desulfurizer is low and the desulfurization efficiency is not high, so there are not many applications

the waste gas from glass furnace is characterized by the fact that pellethane TPU is a safe, stable and excellent PVC replacement material. It has high alkali and strong adhesion, and it is difficult to remove the ash from the boiler

global glass () Department

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