Research On Mercury Pollution And Prevention And Control Technology In Natural Gas Industry

With the development of natural gas industry and the increasing focus onenvironmental protection in our country, mercury pollution control is more and moreconcerned by the governmentand scholars from all walks of life. Mercury in natural gaswill not only cause corrosion damage to the cooling equipment, but also severely pollutethe atmospheric environment. Establishing the mercury emission list of natural gasindustry can provide some data basis for our country to formulate mercury emissionreduction policies in natural gas industry, so as to promote mercury removal technologiesdevelopment in this industry.This article investigated the distribution and natural gas production of the main oiland gas fields, the mainstream gas processing crafts in natural gas industry and mercuryconcentration in natural gas. The mercury emission estimation from2001to2011innatural gas industry was conducted, using default mercury input and output factors inMercury Toolkit. Basing on the gas production and mercury concentration of oil and gasfields in2011, the mercury emission of each gas processing point was estimated by usingmaterial mass method and weighted average method, and the average atmosphericmercury emission factor(35.23μg/m3) in natural gas industry was also confirmed.According to the estimated results, among the total mercury emission of natural gasindustry in2011, there are867kg mercury existing in gas condensate,482kg indesulfurized off-gas,850kg in wastewater and the residual1735in commercial naturalgas. The influence of four mainstream natural gas processing crafts on mercury emissionin our country was also involved in this article, finally the effect of sulfur-saturatedactivated carbon on the emission reduction of mercury was evaluated.