Methods for desulfurization, denitrification, and dust removal: There are many methods for desulfurization, denitrification, and dust removal, and commonly used methods include coating with special paint, tiling, and casting stone layers. The following is a detailed analysis of these three methods: 1. Wet desulfurization, denitrification, and dust removal systems not only deal with acid-base corrosion, but also damage factors such as erosion, wear, and burning from high-temperature dusty flue gas. No matter how strong the ability of the paint is, it will quickly be worn and eroded clean, and lose its ability. 2. The corrosion and ability of the cast stone protective lining are strong, but the ability is slightly poor. It is advisable to avoid dry burning of the dust collector without water as much as possible. Therefore, steel wet dust collectors use cast stone protective lining. 3. The method of tiling has strong protection against acid and alkali corrosion and wear, but tiles above the water surface are prone to falling off due to frequent and drastic temperature changes, so it is less commonly used. Technical characteristics of desulfurization, denitrification and dust collector: The desulfurization, denitrification and dust collector belongs to environmental protection equipment. A water jacket container is installed on the outer wall of the flue gas channel. According to the principles of aerodynamics and fluid dynamics, the flue gas and water entering the equipment are accelerated to collide, causing water to form small water droplets under the action of high-speed and high-temperature flue gas flow. The formation of small water droplets increases the contact area between flue gas and water. The dust, sulfur-containing oxides and alkali lime containing water in the flue gas undergo neutralization reaction to produce gypsum, which is then separated from the air through a separation layer to separate water and gypsum. The technical characteristics of desulfurization, denitrification, and dust removal equipment include: 1. Medium denitrification efficiency, low investment cost, and low operating expenses; 2. Not using expensive catalysts; 3. The solution injection can automatically adjust the injection amount according to the change of boiler load; 4. No need for large-scale renovation of the boiler, minimal impact on the boiler, and no need to replace the induced draft fan; 5. Short construction period and simple construction; 6. No secondary pollution is generated. Transient temperature field analysis of desulfurization spray gun in desulfurization and denitrification dust collector: The desulfurization spray gun is an important component of the desulfurization and denitrification dust collector. In this article, let's take a look at the transient temperature field analysis of the desulfurization spray gun, which includes two stages: first, the desulfurization spraying stage, where the outer surface of the gun lining exchanges heat with the molten iron, and the heat transfer coefficient between the outer surface and the molten iron is taken as 8000W/(m2 · K), and the temperature of the molten iron is taken as 1350 ℃; 2、 During the cooling stage of the package, the outer surface of the gun lining radiates heat to the ambient air due to high temperature, and also exchanges heat with the surrounding air through convection, with a convective heat transfer coefficient of 10W/(m2 · K). An increase in airspeed is not conducive to improving the desulfurization ability of desulfurizers. Space velocity is an important parameter in catalytic reactions. It is a measure of the residence time of flue gas (wet flue gas under standard conditions) within the catalyst volume, which to some extent determines whether reactants react, as well as the flushing of the reactor catalyst skeleton and the resistance of the flue gas along the way. An increase in airspeed increases the total gas flow rate, reducing the contact time between the SO2 mixture and the catalyst bed in the reactor. Due to the reduction of contact time, it is not conducive to the diffusion and adsorption of reaction gases within the catalyst pores, as well as the desorption and diffusion of reaction gases and products, resulting in a decrease in the removal rate of SO2. The boundary conditions of the spray gun during operation and the temperature field have been repeatedly verified. After 5 cycles of operation, the thermal stress of each component of the spray gun gradually tends to stabilize. Therefore, this article analyzes the trend of thermal stress changes in 5 working cycles. When the reaction temperature is between 30-80 ℃, the desulfurization activity increases with the increase of reaction temperature; When the reaction temperature is between 80-95 ℃, the desulfurization activity begins to slowly decrease; When the reaction temperature exceeds 95 ℃, the desulfurization activity significantly decreases. From the above analysis, it can be seen that the reaction temperature significantly affects the reaction activity of the desulfurizer. The desulfurization reaction of the desulfurization device includes physical adsorption, chemical adsorption, and water dissolution.
