Coal-fired energy-saving desulfurating agent

Abstract

The invention provides a coal-fired energy-saving desulfurating agent, which is characterized by consisting of the following components in percentage by weight: 60 to 80 percent of papermaking waste residue white mud, 1 to 3 percent of sodium phosphate, 2 to 6 percent of polyaluminium chloride, 14 to 23 percent of sodium carbonate, 1 to 3 percent of mixture of sodium acetate and potassium acetate, and 2 to 4 percent of mixture of magnesium sulfate and magnesium oxide. The energy-saving desulfurating agent is suitable for raw coal sulphur with the sulphur content of 1 to 8 percent, 5 to 12 percent of desulfurating agent is added based on the weight of raw coal, the desulfurization rate is between 60 and 90 percent, and the coal saving rate is between 4 and 6 percent.

Description

technical field [0001] The invention relates to a coal-fired energy-saving desulfurizer. Background technique [0002] At present, the desulfurization of many thermal power plants and a large number of coal-fired enterprises is to crush the limestone and grind it into powder, and then the limestone powder is made into a slurry and sprayed into the flue by a high-pressure pump to react with SO2 in the flue gas to form calcium sulfate dihydrate. After separation treatment, the calcium sulfate dihydrate is separated from the water, and the water is reused. Or directly send limestone powder into the combustion chamber to react and desulfurize in the combustion chamber. Although such technology and equipment are relatively mature, the disadvantages are: one is the waste of resources, and the used desulfurized limestone for burning one ton of coal is greater than 10%. For this reason, a large amount of limestone (mainly composed of calcium carbonate) will be mined for sulfur fix...

AI Technical Summary

Problems solved by technology

Second, it is costly. A medium-sized power plant uses about 1 million tons of coal a year, so the limestone powder used for desulfurization also needs about 100,000 tons. Mining and grinding such a large amount of limestone costs a considerable amount of money.

The third is high cost. The processing cost of one ton of limestone is about 100 yuan per ton

Fourth, the environmental protection effect is not good, causing secondary pollution

However, these methods are either high in investment or complicated in process, so it is difficult to popularize and apply them in small and medium-sized thermal power enterprises.