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The world’s largest cluster of air separation units – those part of Shenhua Ningmei’s 4 million tons per year coal indirect liquefaction project – has been completed recently. It is reported that this cluster of air separation units constitutes the upstream processing equipment in Shenhua Ningmei’s 4 million tons per year coal indirect liquefaction project; it includes 12 air separation units that are currently the largest in terms of production capacity in Asia, with a designed oxygen production capacity of 100,000 standard cubic meters per hour. This air separation unit cluster is divided into east and west series, with one of the series utilizing the process technology and complete sets of equipment provided by the domestic company Hangyang Oxygen. Shenhua Ningmei employs advanced domestic wastewater treatment technologies such as CAST, SBR, BAF, and UASB, as well as cutting-edge processes like SCR, SNCR, wet flue gas desulfurization outside the furnace, and super Claus sulfur recovery. The flue gas from boilers used in projects such as methanol and olefins that have already been built was modified to remove sulfur and nitrogen oxides. In line with the **\"zero emission\" requirement, efforts were made to promote clean production and energy conservation, thereby achieving initial progress toward green development within the industrial park. Jiao Hongqiao, assistant general manager of Shenhua Ningxia Coal Industry Group Company, said that by 2017, the coal chemical sector was expected to have seen a total investment of 104 billion yuan. The production capacity for polyolefins would reach 2 million tons, oil products 3.2 million tons, dimethyl ether 210,000 tons, polyoxymethylene 60,000 tons, sulfuric acid 200,000 tons, and sulfur 200,000 tons. The annual coal consumption would be around 35 million tons, with annual revenue exceeding 43 billion yuan. By then, the Shenhua Ningmei Coal Chemical Industry Base will become the largest coal chemical industry base in the world, with the strongest competitive advantages and the greatest potential for development. By 2020, it is planned that the facility will have an overall investment of 180 billion yuan; its production capacity for coal-based dimethyl ether is expected to reach 210,000 tons, polyoxymethylene production to reach 60,000 tons, coal-based olefins to reach 3 million tons, and coal-to-oil production to reach 6 million tons. Nearly 60 million tons of raw coal will be converted on-site each year, with the total output value exceeding 75 billion yuan.