Wet desulfurization is a desulfurization technology that uses liquid absorbers such as alkaline solutions to wash the tail gas to remove SO2 from the tail gas, and the desulfurization efficiency can reach about 95%, and many cement plants in China have adopted wet desulfurization technology.

SO2 emissions from cement enterprises are mainly sulfur brought in from raw materials, sulfur in raw materials in the form of organic sulfur, sulfide and sulfate, of which sulfide is mainly pyrite and albite (both FeS2), sulfate mainly includes gypsum (CaSO4-2H2O) and hard gypsum (CaSO4).

It is estimated that SO2 emissions from the cement industry account for 3% to 4% of the national SO2 emissions. The SO2 emission of cement enterprises mainly comes from sulfide in raw materials.

Through years of skill improvement and skill innovation, some large domestic desulfurization companies have gradually created state-owned skills with independent intellectual property rights, together with the efforts of relevant domestic manufacturers, the vast majority of equipment in the desulfur

Zinc oxide desulfurizer is a conversion and absorption type desulfurizer, and sulfur has a strong affinity, and the product zinc sulfide has a high stability. Therefore, zinc oxide desulfurizer can fine remove the hydrogen sulfide and part of the organic sulfur in the raw material, and the reaction performance with thiol in organic sulfur is better.

Internationally, there is no precise definition of synthetic oil versus mineral oil, it is a common term, API (American Petroleum Institute) has five categories of base oil, usually the third and fourth category of base oil is called synthetic oil. The usual synthetic oils are: PAO, XHVI, and esters.