When selecting a desulfurization process, the initial investment and operating cost of the desulfurization process should be calculated and compared in detail, and the desulfurization process with low initial investment and low operating cost should be optimized and selected, so that the trapezoid of the desulfurization facility can be increased as little as possible.

The operation of the desulfurization facility does not affect the normal operation of the unit; the desulfurization rate of the trapezoidal mill of the desulfurization facility is stable. Mainly refers to some changes in objective conditions or environment, by adjusting some operating parameters of the desulfurization facility, to keep the SO2 content of the flue gas after desulfurization within the allowable range of environmental protection or to maintain the designed desulfurization rate; the maintenance workload of the desulfurization facility is small. Desulfurization facility is a complex system, which includes many subsystems, try to make each subsystem run stably and reduce maintenance workload.
The desulfurization process with high localization rate and stable operation should be preferred. The high localization rate is not only low initial investment, low electricity price, but also more convenient for long-term operation of spare parts and technical guidance in the future; low water consumption. With the development of industry, water source will often become a restricting factor for industrial construction, especially in the northern water-deficient areas, the desulfurization process with low water consumption should be preferred; the supply of desulfurization agent: the quality of desulfurization agent must be strictly controlled according to the regulations. , so as to ensure the normal operation of the desulfurization facility. Treatment of desulfurized ash. Desulfurization ash should be considered for comprehensive utilization or appropriate treatment measures to prevent environmental pollution.