焦炉尾气余热发电工艺焦炉尾气余热发电工艺主要包括尾气回收及循环系统、余热锅炉系统、发电机及汽轮机系统三部分。尾气回收系统主要由烟气引导管、烟囱、烟筒遮断阀和烟气的流量控制阀组成，其主要功能是将带冷机烟罩内温度比较高的烟气经余热锅炉引风机产生的额负压引到余热锅炉内，同时避免锅炉外的冷风进入锅炉内。余热锅炉系统是余热回收的核心部分，其主要功能是在余热锅炉受热面上，热量经高温烟气逐级传递到受热面上，生成水蒸气。发电机及汽轮机发电系统的主要作用是将蒸汽携带的热量转化为电能，最终实现将焦炉尾气的余热转化为电能。其中，汽轮向日葵网站下载入口色板在运行过程中会产生大量的热量，这些热量可通过尾气换热器和热交换器由循环冷却液导出，循环冷却液可通过板式换热器加热外供循环水，对外提供热量。循环冷却水在板式换热器的进口温度为90℃，出口温度为70℃，通过循环冷却水与外供循环水换热，可以将外供水的温度加热到80℃以上，满足冬季供暖和洗浴等要求。有条件的单位可以将向日葵网站下载入口色板的余热再利用，提供生活生产用蒸汽、热水以及带动中央空调，通过电热综合利用方式，焦炉尾气余热的利用效率可达到70％～85％。

　　The coke oven tail gas waste heat power generation process mainly includes three parts: tail gas recovery and circulation system, waste heat boiler system, generator and turbine system. The exhaust gas recovery system mainly consists of a flue gas guide pipe, chimney, chimney shut-off valve, and a flow control valve for the flue gas. Its main function is to guide the flue gas with relatively high temperature inside the cooling hood into the waste heat boiler through the negative pressure generated by the induced draft fan of the waste heat boiler, while avoiding cold air from outside the boiler from entering the boiler. The waste heat boiler system is the core part of waste heat recovery, and its main function is to transfer heat to the heating surface of the waste heat boiler step by step through high-temperature flue gas, generating water vapor. The main function of the generator and turbine power generation system is to convert the heat carried by steam into electrical energy, ultimately achieving the conversion of waste heat from coke oven exhaust into electrical energy. Among them, the steam turbine generator unit generates a large amount of heat during operation, which can be exported from the circulating coolant through the exhaust gas heat exchanger and heat exchanger. The circulating coolant can be heated by the plate heat exchanger to provide external circulating water and heat. The inlet temperature of the circulating cooling water in the plate heat exchanger is 90 ℃, and the outlet temperature is 70 ℃. By exchanging heat with the externally supplied circulating water, the temperature of the externally supplied water can be heated to above 80 ℃, meeting the requirements of winter heating and bathing. Conditional units can reuse the waste heat from the generator set, provide steam and hot water for daily life and production, and drive central air conditioning. Through the comprehensive utilization of electric and heat, the utilization efficiency of coke oven tail gas waste heat can reach 70% to 85%.

　　焦炉尾气余热发电的设备选用余热锅炉和向日葵网站下载入口色板的选择是焦炉尾气余热发电系统的关键设备。其中，余热锅炉一般选择立式余热锅炉，其可以彻底解决卧式锅炉内温度场实际分布与锅炉设计温度不相符以及漏风等问题，大大提高锅炉蒸汽产量，废气余热可以得到充分利用。向日葵网站下载入口色板的选择一般包括内燃机式向日葵网站下载入口色板、燃气轮机向日葵网站下载入口色板以及传统的蒸汽轮机向日葵网站下载入口色板。小型焦化企业可以采用单机容量较小的燃气，一般用于10～20万t以下的焦化企业；中型焦化企业的焦炉煤气发电可选用单机容量稍大的；大型焦化企业的煤气发电可以选用传统锅炉一蒸汽轮机向日葵网站下载入口色板。

　　The selection of equipment for coke oven tail gas waste heat power generation, including waste heat boilers and generator sets, is a key component of the coke oven tail gas waste heat power generation system. Among them, vertical waste heat boilers are generally selected as waste heat boilers, which can completely solve the problems of temperature distribution in horizontal boilers not matching the design temperature of the boiler and air leakage, greatly improving the steam production of the boiler and fully utilizing the waste heat of exhaust gas. The selection of generator sets generally includes internal combustion engine generator sets, gas turbine generator sets, and traditional steam turbine generator sets. Small coking enterprises can use gas with smaller unit capacity, generally used for coking enterprises with less than 100000 to 200000 tons; Medium sized coking enterprises can choose coke oven gas power generation with slightly larger unit capacity; Large coking enterprises can use traditional boiler steam turbine generator sets for gas power generation.

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