Technology for desulfurizing coal with large particle size by microwave-assisted halogen elements

[0029] The sulfur content in coal is required to be ≤2%, and the steps are as follows:

[0030] S1. Select 100g of Gaoyang coal as raw coal, crush and screen to ensure that the particle size is 1-6mm, and obtain a coal sample; here, the particle size of the coal is preferably within the range of 1-6mm, and the desulfurization efficiency in this range is better. In other embodiments, it is also acceptable if the particle size is >6mm.

[0031] S2. Configure reaction agent: dissolve bromine elemental substance in water to form a bromine aqueous solution with a mass concentration of 3% as a desulfurization reaction agent; here, the concentration of bromine water is preferably 1%-3%, and the concentration within this range can ensure the reaction rate, and can ensure the thoroughness of desulfurization under the premise of not wasting bromine water, wherein, 3% is the most preferred concentration value, and in other embodiments, 1% or 1.5% or 2% or 2.5% can also be selected, as long

[0041] The sulfur content in coal is required to be ≤0.5%, and the steps are as follows:

[0042] Step S1~S5 among the embodiment 1 is repeated 5 times, other steps are constant,

[0043] According to the high-temperature combustion coulomb method, the total sulfur content in coal was reduced from 2.13% to 0.22%, and the desulfurization rate was 90.04%.

[0044] The sulfur content and desulfurization rate corresponding to the repeated reaction times of the coal sample are as follows:

[0045] Number of experimental responses 1 time 2 times 3 times 4 times 5 times Sulfur content% 1.63 1.23 0.94 0.53 0.22 Desulfurization rate% 26.24 44.15 57.32 75.81 90.04

[0047] The sulfur content in coal is required to be ≤2%, and the steps are as follows:

[0048] S1. Select 100g of Gaoyang coal as raw coal, crush and screen to ensure that the particle size is 1-6mm, and obtain a coal sample; here, the particle size of the coal is preferably within the range of 1-6mm, and the desulfurization efficiency in this range is better. In other embodiments, it is also acceptable if the particle size is >6mm.

[0049] S2. Configure reaction agent: dissolve bromine elemental substance in water to form a bromine aqueous solution with a mass concentration of 3% as a desulfurization reaction agent; here, the concentration of bromine water is preferably 1%-3%, and the concentration within this range can ensure the reaction rate, and can ensure the thoroughness of desulfurization under the premise of not wasting bromine water, wherein, 3% is the most preferred concentration value, and in other embodiments, 1% or 1.5% or 2% or 2.5% can also be selected, as long