Sulfur capturing agent for wet desulphurization, and preparation method and application method thereof

The invention discloses a sulfur capturing agent for wet desulphurization, and a preparation method and an application method thereof. The sulfur trapping agent comprises the following raw material components in parts by weight: 0.8-1.2 parts of strontium carbonate, 28-32 parts of sodium citrate, 6-8 parts of sodium diacetate and 56-64 parts of calcium carbonate. The preparation method comprises the following steps: mixing and stirring strontium carbonate, sodium citrate, sodium diacetate and calcium carbonate, grinding until the powder fineness reaches 80 meshes or above, adding 1.8-2.2 parts of solubilizer, and mixing to prepare a finished product with the density of 2.0 +/-0.5 g/cm < 3 >. The desulfurization effect is good, the sulfur dioxide absorption rate is high, sulfur dioxide fluctuation at a desulfurization outlet is small, and stable production control can be achieved; in the using process, a spraying pipeline is not blocked, the desulfurization slurry circulating pump runs smoothly, and stable pro