Coke oven flue gas denitration has been operating successfully for 3 months

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The last edit to this post was made by angryant on 2016-8-6 at 17:17. The first low-temperature SCR denitration system for flue gas in Shandong’s coking industry has been operating stably for three months. The 130-ton/year flue gas denitration project for Linyi Hengchang Coal Chemical Co., Ltd., which was contracted out to Shandong Yangguang Tianrun Environmental Protection Engineering Co., Ltd., was put into operation successfully in May 2016 and has remained in stable operation for nearly 100 days. This device is designed for a flue gas flow rate of 220,000 Nm3/h, with a NOx concentration of ≤1000 mg/m3, a dust concentration of ≤80 mg/m3, a flue gas temperature of 260°C to 290°C, and a SO2 concentration of ≤500 mg/m3. The process of this device employs a pre-dust removal process + ammonia evaporation process + SCR. Comparison of operational data: Name, Actual flue gas parameters, Design parameters, Actual parameters. At the SCR inlet and outlet, NOx concentration: 800–908 mg/m3; 72–80 mg/m3; ≤150 mg/m3; ≤80 mg/m3. Denitration efficiency: 85%; 90–91%. Temperature drop: 285–293°C; 280–284.3°C; ≤20°C; ≤10°C. SO2 concentration: 535–545 mg/m3; 508–518 mg/m3; 500–527 mg/m3. SO2/SO3 conversion rate: ≤1%; ≤0.5%. Ammonia escape: 1.7–3 ppm; ≤10 ppm; ≤3 ppm. Particulate matter concentration: 50–81.6 mg/m3; 27–35 mg/m3; ≤50 mg/m3; ≤35 mg/m3. SCR pressure drop: –550 to –600 Pa; –1100 to –1180 Pa; ≤800 Pa; ≤580 Pa. Technical highlights: 1. The flue gas in this project contains sticky dust, hence a flue gas dust removal process was implemented in this project ； 2. In the ammonia spraying process of this project, residual ammonia water from the coking industry is used to reduce operating costs ； Since the residual ammonia water in the coking industry is rich in impurities, an ammonia evaporation process was implemented in this project ； Three months of operation have proven that by utilizing our company’s comprehensive technology, it is entirely possible to meet the design specifications, providing strong technical support for coking enterprises to achieve environmentally compliant emissions. In addition, our company has over twenty project cases for flue gas desulfurization and waste heat recovery in coke ovens. With the successful application of this out-of-stock technology, our company has managed to become an engineering and technical firm with proven expertise in integrated technologies for desulfurization, denitration, and waste heat recovery of coking flue gas. Our company is willing to use its advanced technology and high-quality services to support the environmental protection and sustainable development of various coking enterprises. Shandong Yangguang Tianrun Environmental Protection Engineering Co., Ltd. Mu Rongxin 13583841599