An energy-saving wet flue gas, sulfur and dust integrated ultra-low emission process

Abstract

The invention discloses an energy-saving wet flue gas, sulfur and dust integrated ultra-low emission process, which includes a desulfurization tower. The desulfurization tower is sequentially equipped with a high-efficiency demister, a multi-stage spray layer, and a porous distribution layer. The spray layer is provided with nozzles facing downwards; the slurry pool is connected to the spray layer through a circulating spray pipeline with a slurry circulation pump; the multi-stage spray layer is circulated with the slurry outside the desulfurization tower One-to-one corresponding setting of the pumps; including the following steps: S1. According to the maximum amount of flue gas to be treated by the desulfurization tower, after calculating the total value of the slurry circulation flow required by the desulfurization tower, the total value of the slurry circulation flow is proportionally different Sequential distribution to each spray layer; S2. Selectively configure each slurry circulating pump according to the actual amount of treated flue gas during the peak shaving period. The invention can save the operating power consumption of the system and save the cost at the same time when the coal-fired power plant operates at medium and low load through the differential design of the flow of the spray layer and the slurry circulating pump.

Description

technical field [0001] The invention belongs to the technical field of flue gas treatment, and relates to an energy-saving wet flue gas sulfur dust integrated ultra-low emission process. Background technique [0002] With the improvement of science and technology level and the adjustment of national energy policy, solar power generation, hydropower generation, wind power generation and other new green energy technologies have been greatly developed. In the past few decades, the power supply situation dominated by coal-fired power generation has undergone fundamental changes. Many coal-fired generators have been formed into peak-shaving units, that is, only when the power generated by all new green energy technology power generation equipment cannot meet peak hours. In the case of demand on the power consumption side, the coal-fired generator sets increase from low load (small power generation) to higher load to make up for the shortfall in power demand. The reason why this ...

AI Technical Summary

Problems solved by technology

Usually in the wet flue gas desulfurization system, the slurry circulation pump is set with the same specifications, which cannot accurately match the flue gas volume treatment requirements of the coal-fired generating set at low load. Economical operation, resulting in waste of energy

Images