[China Glass Network] The particularity of glass furnace furnace flue gas treatment Wide Stripe For Hard Floor Pvc Wide Stripe For Hard Floor Pvc,Carpet Protector Runner,Desk Chair Carpet Protector,Pvc Carpet Protector Taizhou Ruihu Plastics Co.,Ltd , https://www.tzruihu.com
Glauber's salt and soda ash should be added in the production process of glass, which leads to very complicated flue gas composition, which has great influence on denitrification, desulfurization and dust removal. Second, most glass production lines use inferior fuel such as petroleum coke powder and petroleum coke powder fuel. The generated flue gas exacerbates the difficulty of flue gas treatment, especially denitrification. Third, the kiln dynamically changes fire. The glass kiln changes fire every 15 to 20 minutes. During the process of changing fire, sulfur dioxide, particulate matter and nitrogen oxides will change drastically. Fourth, the kiln pressure balance. The smoothness of the kiln pressure is very important in the glass production process. The whole set of desulfurization, denitrification and dust removal equipment are installed at the tail of the kiln flue gas. Once it is not accurately designed, it will affect the kiln pressure balance, which will lead to the appearance of glass quality and even the kiln glass scrap. Fifth, the concentration of nitrogen oxides is high. In general, the concentration of nitrogen oxides in glass furnaces should be above 2000 mg/Nm3.
Main features of glass furnace flue gas:
The flue gas temperature is high, the flue gas flow rate is moderate, the content of SO2 in the flue gas is relatively high, and the dust content is low. In the engineering design of flue gas treatment, high desulfurization efficiency is required, and certain dust removal efficiency is required; investment cost Province, low desulfurization cost; small footprint; mature technology, stable and reliable operation, to avoid adverse effects on the kiln pressure of glass furnace. The treatment and utilization of float glass furnace flue gas by medium and low temperature flue gas waste heat power generation technology and double alkali desulfurization technology is in full compliance with national energy conservation and environmental protection policies, technically feasible and economically reasonable. The two technologies complement each other: on the one hand, the temperature of the flue gas is reduced by the use of waste heat, which provides certain conditions for desulfurization treatment; on the other hand, the economic benefits of waste heat power generation are considerable, providing financial support 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. Dry methods commonly used in the dry process are calcium in the furnace (lime/limestone), metal absorption, and the like. Dry desulfurization is a traditional process, the desulfurization rate is generally not high (<50%), and industrial applications are less.
Semi-dry desulfurization is the use of flue gas sensible heat to evaporate the water in the desulfurization slurry. At the same time, during the drying process, the desulfurizing agent reacts with SO2 in the flue gas, and the final product is dry powder. Since the desulfurizing agent added to the system by the method is wet, and the desulfurization product from the system is dry, it is called a semi-dry method. The semi-dry method uses more spray drying method flue gas desulfurization, circulating fluidized bed flue gas desulfurization (CFB-FGD) and humidification ash cycle flue gas desulfurization (NID method). When semi-dry desulfurization is used, the utilization rate of the desulfurizing agent is low, and the desulfurization efficiency is not high, so the application is not much.
The exhaust gas of the glass melting furnace is characterized by high alkali content, strong adhesion, and difficulty in cleaning the boiler.