1、 Selection of desulfurization, denitrification and dust collector: 1. When selecting a desulfurization, denitrification and dust collector, reference should be made to the combustion characteristics of the fuel. Some units mainly refer to the relevant data in the boiler design coal type when selecting desulfurization and denitrification equipment, but the achieved effect is not ideal. Therefore, the equipment should be selected based on the actual characteristics of coal combustion. If the boiler operates at a specific load value, then the input heat of the fuel and the air flow rate are equal. Compared with the designed coal type, Datong coal has a higher heat generation and a lower coal consumption. If the thickness of the thin grate coal seam is reduced while keeping the air flow constant, the air flow of the grate will be uneven and the fuel will not burn; If the amount of air blown is reduced, the fuel cannot be burned out. It can be seen that in order to burn coal, it is necessary to design the coal type to be the same as the thickness of the coal seam, and to increase the air blowing volume appropriately. To ensure the stable operation of the boiler, while feeding coal, it is also necessary to increase the air flow rate, which will increase the total heat generation of the furnace, thereby improving the emission and flow rate of flue gas. 2. If the resistance of flue gas is in use in a boiler, then choose a desulfurization, denitrification, and dust collector for it; At the same time, the factor of flue gas resistance should also be considered. If the flue gas resistance is too small, the ideal desulfurization and dust removal effect cannot be achieved. If the flue gas resistance is too large, the flue gas flow rate of the induced draft fan will decrease, and the boiler will experience positive pressure combustion. Therefore, when choosing desulfurization and dust removal equipment, it is recommended to choose equipment with appropriate flue gas resistance and simple structure. If the selected equipment cannot achieve the desired desulfurization and dust removal effect, it is recommended to replace the induced draft fan, which will inevitably increase the investment cost. 3. Traditional boilers in installation sites only install simple dust removal equipment, while at present, industrial boilers are equipped with desulfurization, denitrification, and dust collectors. If the structure of the boiler room does not change, the footprint of the auxiliary equipment room in the boiler room will affect the selection of desulfurization, denitrification, and dust collectors. If the volume of the equipment is too large, the operation and handling of various auxiliary equipment will be affected, and the difficulty of arranging the air duct will increase. At the same time, the total resistance of the flue gas in the air duct will also increase. In the process of equipment selection, not only the external dimensions of the equipment should be considered, but also factors such as the orientation and position of the flue gas connection point should be taken into account. 2、 Preparation before operation of desulfurization, denitrification and dust collector: 1. Before using the desulfurization, denitrification and dust collector, training should be provided to the operators. After the installation of the desulfurization, denitrification and dust collector in the power plant, it is generally selected from internal factory employees to work in the desulfurization department. The different operation and maintenance methods of the equipment make it very difficult for the operators to work. Inexperienced operation and lack of understanding of equipment performance can lead to low efficiency of the desulfurization, denitrification and dust collector. Therefore, before using the equipment, operators are required to be familiar with the process flow and usage methods of the desulfurization, denitrification, and dust collector, as well as the working performance of the equipment. When problems arise, they should be able to handle them calmly and calmly. 2. The desulfurization, denitrification and dust collector needs to be started correctly and standardized. If a new device encounters problems during startup due to operational errors, it can seriously affect its future operational status and work efficiency. In addition, it is necessary to flush the pipelines in the desulfurization, denitrification, and dust collector before starting. 3. Strictly follow the regulations of the desulfurization process for equipment operation, strictly control the proportion of desulfurizer use, and regularly check the pH value of each part to prevent local scaling of the equipment. 3、 The reason for the desulfurization and denitrification dust collector is that during the operation of the dust collector, if the emissions exceed the standard and the operating pressure of the dust collector is too low compared to the design, it is highly likely that the initial powder layer on the surface of the dust filter bag is insufficient, which may be caused by the high filtration speed of the filter bag. After multiple cycles, the desulfurized slurry is discharged into the post-treatment system. Due to the design, when the desulfurized flue gas passes through the tower top defogger, the liquid droplets in the flue gas are separated, achieving the effect of simultaneous dust removal and defogging. The desulfurization, denitrification and dust collector has the characteristics of low cost, short production cycle, long service life, easy processing, simple installation, light weight, strength, etc. As filtration continues, due to adhesion, interception, and other effects, dust particles gradually form a dust layer on the surface of the filter bag. As the dust on the surface of the filter bag continues to increase, the resistance of the filter bag increases. When the pressure difference in the filter bag chamber reaches the set value or runs for the set time, the control instrument sends a signal to close the exhaust port of the unit filter bag chamber, making the chamber offline. The desulfurization, denitrification and dust collector mainly realizes the self start stop of the main process units or systems; Implement sequential control and experimental operations for the absorption tower; Implement sequential control and trial operation of auxiliary system valves and smoke dampers; Implement interlocking control of auxiliary equipment and its related cooling system, lubrication system, and sealing system. The development of desulfurization, denitrification, and dust collectors is an unremitting pursuit of energy conservation and environmental protection. The process of desulfurization, denitrification, and dust collectors achieves social and economic benefits. The selection of desulfurization and denitrification processes should be based on both the efficiency of desulfurization and denitrification and the economic operation of the system. Fully combining the objective conditions and requirements of users, adapting to local conditions, utilizing existing resources and limited space, optimizing and combining, and formulating targeted and practical technical solutions. While emphasizing equipment performance, it is important to minimize operating costs and prioritize the rational selection of equipment.
