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 Coke Oven Gas |
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| DDS desulfurization 2# project in coal chemistry company of Shanxi Dongyi Group was operated successfully |
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| Established in 2000, Shanxi Dongyi coal power Aluminum Group is a private enterprise group integrating electric power, metallurgy, chemical industry, building materials, logistics trade and vocational education. It is mainly engaged in the production and distribution of electricity, raw coal, clean coal, coke and chemical products, ferroalloy, magnesium and magnesium alloy and magnesium alloy products, cement, commercial concrete, high activity calcium oxide and other products. Its headquarters is located in Xiaoyi Economic Development Zone (Wutong town), Shanxi Province, covering an area of 3000 mu. The existing assets are 6 billion yuan and profits and taxes are 1 billion yuan. On November 17, 2020, the desulfurization phase II system of Dongyi group coal chemical company began formal operation and added DDS desulfurization catalyst series. |
| The coke oven gas processing capacity of Dongyi phase II project is about 83000Nm³/h. Hydrogen sulfide content 5000~6000mg/Nm³. After adopting DDS biological desulfurization technology, the removal effect of hydrogen sulfide at the outlet of Dongyi phase II gas is very good. The concentration of hydrogen sulfide in the outlet gas decreases rapidly after dosing on November 17, 2020 and reaches 11.63mg/Nm³ on November 25, 2020. So far, it is stable at 15mg/Nm³ following.
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| In December 2020, the coke output was 123000 tons. Under the premise of "110000 tons/month coke capacity" specified by Dongyi Group, Boyuan company has been maintaining the export hydrogen sulfide less than 15mg/Nm³. Before the start-up of the system, we arranged technicians to train Dongyi laboratory the desulfurization solution detecting method and establish the detection standard. Now, the pH value, volatile ammonia and suspended sulfur in the desulfurization solution are detected every day, and the iron ion content and by-product salt content are detected regularly. Our technicians have been stationed in the field since the start of the system, providing technical support, and designing and guiding the installation of an automatic dosing system and vacuum filters for sulfur foam filtration.
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| After several months of stable operation, we conducted corrosion detection on the desulfurization tower, regeneration tower, pipeline and other equipment on site, and found no signs of corrosion. At the same time, the resistance of the desulfurization tower has been stable at about 0.6kPa without tower blocking. During operation, the solution will not be discharged and will be fully recycled. This shows that DDS catalysts has obvious desulfurization effect, quick effect, no tower blocking and solution discharge, and creates huge economic and social benefits for the enterprise.
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| 2021.1.21 Project Meeting |
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2021.1.21 Project Meeting |
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