Abstract

The conditions of coal ignition and combustion with application of plasma ignition system have been studied experimentally. Research on plasma ignition of coal fuel flow was carried out on a pilot setup. The conditions were close to the industrial ones used for start-up of coal boilers. The operating range of the velocities of pulverized coal flow in the electric arc unit has been determined. It has been established that a stable process of ignition and further combustion of coal is possible at these flow velocities in the electric arc unit. The experimental setup was started up from a cold state and heated to a temperature of 1000°C; the start-up time did not exceed 200 s. Based on the obtained experimental results, an industrial prototype of plasma ignition system (PIS) was designed and tested with a TP-10 boiler with a capacity of 220 tons of steam per hour. The boiler was started up from a cold state by means of the PIS technology without use of fuel oil; the start-up time was 5 hours. After the pass of pulverized coal through the PIS, stable ignition and combustion of pulverized coal flame with a temperature of 1350°C was observed in the boiler. For the first time, a technology for ignition of pulverized coal boilers without use of fuel oil was created and implemented on the basis of a starting burner with plasma ignition of fuel. The technology features positive economic and environmental parameters in comparison with the widespread technology of starting up coal-fired boilers with liquid fuel combustion.

中文翻译：

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启动煤粉锅炉的等离子点火系统：实验模拟和全面测试

摘要

对应用等离子点火系统的煤着火和燃烧条件进行了实验研究。在中试装置上进行了煤燃料流的等离子体点火研究。条件接近于燃煤锅炉启动的工业条件。已经确定了电弧装置中煤粉流动速度的运行范围。已经确定，在电弧单元中的这些流速下，煤的稳定点火过程和进一步燃烧是可能的。实验装置从冷态启动并加热到1000°C；启动时间不超过 200 秒。根据得到的实验结果，设计了一台等离子点火系统 (PIS) 的工业原型，并使用 TP-10 锅炉进行了测试，该锅炉的容量为每小时 220 吨蒸汽。锅炉采用PIS技术在不使用燃油的情况下从冷态启动；启动时间为5小时。煤粉通过PIS后，在锅炉中观察到温度为1350℃的煤粉火焰稳定点火和燃烧。首次在燃料等离子点火启动燃烧器的基础上，创建并实施了不使用燃料油的煤粉锅炉点火技术。与使用液体燃料燃烧启动燃煤锅炉的广泛技术相比，该技术具有积极的经济和环境参数。锅炉采用PIS技术在不使用燃油的情况下从冷态启动；启动时间为5小时。煤粉通过PIS后，在锅炉中观察到温度为1350℃的煤粉火焰稳定点火和燃烧。首次在燃料等离子点火启动燃烧器的基础上，创建并实施了不使用燃料油的煤粉锅炉点火技术。与使用液体燃料燃烧启动燃煤锅炉的广泛技术相比，该技术具有积极的经济和环境参数。锅炉采用PIS技术在不使用燃油的情况下从冷态启动；启动时间为5小时。煤粉通过PIS后，在锅炉中观察到温度为1350℃的煤粉火焰稳定点火和燃烧。首次在燃料等离子点火启动燃烧器的基础上，创建并实施了不使用燃料油的煤粉锅炉点火技术。与使用液体燃料燃烧启动燃煤锅炉的广泛技术相比，该技术具有积极的经济和环境参数。在锅炉中观察到温度为1350℃的煤粉火焰稳定点火和燃烧。首次在燃料等离子点火启动燃烧器的基础上，创建并实施了不使用燃料油的煤粉锅炉点火技术。与使用液体燃料燃烧启动燃煤锅炉的广泛技术相比，该技术具有积极的经济和环境参数。在锅炉中观察到温度为1350℃的煤粉火焰稳定点火和燃烧。首次在燃料等离子点火启动燃烧器的基础上，创建并实施了不使用燃料油的煤粉锅炉点火技术。与使用液体燃料燃烧启动燃煤锅炉的广泛技术相比，该技术具有积极的经济和环境参数。