焦炉荒煤气自动放散点火控制的设计_毕业设计论文.doc

攀枝花学院本科毕业设计（论文） 摘要 PAGE V 焦炉荒煤气自动放散点火控制的设计 摘 要 焦炉荒煤气外泄是炼焦生产过程中的主要污染源，直接排入大气，严重污染环境，必须设置自动放散点火装置。该系统具有自动、程控、手动点火功能，点火检测可靠，大大提高焦炉点火装置的技术含量。 荒煤气俗称粗煤气，外观为黄褐色的气混合物，其成分相当复杂，主要有焦油物、硫化物、氰化物、氨、碳氢化合物等有害物质，其中以苯并吡为代表的多环芳烃有很强的致癌性。而焦炉荒煤气外泄是炼焦生产过程中的主要污染源。尤其当风机故障、突然停电、煤气疏导系统故障而集气管煤气压力居高不下时，只能直接排入大气，造成污染，又导致焦炉四处跑烟冒火，甚至烧坏焦炉铁件。KRCFC-Ⅲ型放散点火控制装置，即是针对上述问题而设计的焦炉荒煤气自动点火装置。该装置以PLC技术为基础，煤气压力为控制参数，实现压力报警、煤气放散点火、蒸汽控制等功能。该套装置具有技术先进、设计合理、结构简单、操作和维护方便的特点。它可以保障集气管压力过高时的煤气放散，同时点燃煤气保护大气环境，有助于减轻工人的劳动强度。此放散点火控制装置具有潜在的经济效益和社会效益。由此可见对荒煤气的处理经历了从直接排放到大气，到简单的应用，直到现在这样能够比较令人满意的较为完美的解决方法。然而金无足赤，人无完人，即使对荒煤气的处理发展的今天，其仍旧可以改进。根据集气管压力的变化，成功开发了集气管荒煤气自动点火放散控制系统，解决了荒煤气放散管翻板动作幅度过大对集气管压力造成波动的影响，有效保证焦炉压力系统的稳定，降低了焦炉冒烟现象，延长炉体寿命，改善了焦炉操作环境。 关键词 荒煤气，气体，点火，自动控制 攀枝花学院本科毕业设计（论文） ABSTRACT ABSTRACT Coke oven waste gas leakage is the main pollution sources in the process of coking production, directly into the atmosphere, serious environmental pollution, must set up automatic radiation ignition device. The system with functions of automatic, SPC, manual ignition, the ignition test is reliable, greatly improve the technical content of coke oven ignition device. Waste gas is commonly known as crude coal gas, appearance is tan of mixture gas, its composition is complicated, mainly has the tar content, sulfide, cyanide and ammonia, hydrocarbons and other harmful substances, which represented by benzene and overlooks the carcinogenicity of polycyclic aromatic hydrocarbons, which have very strong. And coke oven waste gas leakage is the main pollution sources in the process of coking production. Especially when the fan failure, sudden power outages, gas channel system failure and gas collector gas pressure is high, can only be directly discharged into the atmosphere, pollution, and result in coke oven started running around the smoke, even burning coke oven iron. KRCFC - Ⅲ tossing in the ignition control device that is designed according