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Jilin Petrochemical’s \"X-ray vision\" solves the ash removal problem, China Chemical Industry News, March 26, 2025. According to Sinochem News Network, on March 20, a set of ordinary-looking high-temperature resistant glass viewing lenses were put into use in the sulfuric acid production area of Jilin Petrochemical’s acrylonitrile plant. This modification to the small device, developed independently by the factory, not only solved the problem of dust removal but also led to a double increase in both production efficiency and safety levels. As the core equipment of the sulfuric acid plant, the waste heat boiler is responsible for recovering the residual heat from the high-temperature flue gas, and it serves as the lifeline for environmental protection in this facility. “The 955 heat exchange tubes function like the vascular network of the device, while the ash in the flue gas acts as ‘clots’ within these blood vessels. Traditional ash removal methods require the use of two access ports at the same time, which not only affects the stability of the system’s negative pressure but also poses risks to the operators. ”He Qixue, the deputy director of the company’s workshop, explained. To overcome this challenge, they formed a task force and used high-temperature-resistant glass with a wide field of view as replacements for the traditional small observation hole covers, effectively equipping the device with a \"seeing eye\". After the modification, the operator can accurately observe the movement path of the dust cleaning gun within a 10-meter-long pipeline through the sight glass, without the need to open a second access port. This seemingly simple innovation overcame numerous technical challenges, including optical monitoring and sealing design under high-temperature conditions. He Qixue said, “In the past, cleaning dust was like trying to understand an elephant by touching it blindly; now, with real-time monitoring, the efficiency of these tasks has increased by over 30%.” ”At the dust removal site, the author observed that the dust removal gun could accurately enter the 63-mm pipe opening guided by the sight glass. The data shows that after the modification, the time required for each dust cleaning cycle was reduced from 7 hours to 5.5 hours. The system operates more stably during dust cleaning, which directly reduces the risk of unplanned shutdowns and improves work efficiency.