Due to the high efficiency flue gas waste heat recovery technology widely used in coke oven, about 50%~55% of coke oven gas is surplus. Many coking enterprises in China use the remaining coke oven gas for power generation. There are three types of power generation with coke oven gas, namely steam power generation (cogeneration), gas turbine power generation and internal combustion engine power generation. At present, these types of power generation have been applied in China with mature technology. If the coking enterprise matches the production with high power consumption or is associated with the power generation and power supply enterprise, and the on-grid electricity price is appropriate, the use of coke oven gas for power generation can be one of the preferred technical options. Its operation and management are simple, the production time is long, and many ways can be adopted, so the enterprise income is stable.

1、蒸汽发电，热电联产供热与发电兼用

1. Steam power generation, cogeneration for heating and power generation

蒸汽发电由锅炉-凝气式气轮机-发电机组成。该工艺以焦炉煤气作为热源燃烧锅炉，生成高压蒸汽，用以带动汽轮机、发电机而发电。蒸汽发电技术过关、成熟可靠。在我国焦化行业应用较广泛，但其系统复杂、占地面积大、启动时间长。

Steam power generation consists of boiler, condensing gas turbine and generator. The process uses coke oven gas as the heat source to burn the boiler and generate high-pressure steam to drive the steam turbine and generator to generate electricity. The steam power generation technology is qualified, mature and reliable. It is widely used in China's coking industry, but its system is complex, covers a large area and takes a long time to start.

2、焦炉煤气用于燃气轮机发电

2. Coke oven gas used for gas turbine power generation

燃气轮机发电是用焦炉煤气直接燃烧，驱动燃气轮机以带动发电机发电。燃气轮机发电机组设备紧凑、占地少、效率高、效益好、启动速度快。不过，燃气轮机运行一段时间后必须远距离运回制造厂检修，因此需要较多的备品，要求工人有较高的技术素质。

Gas turbine power generation is the direct combustion of coke oven gas to drive the gas turbine to drive the generator to generate electricity. The gas turbine generator unit has compact equipment, small floor space, high efficiency, good efficiency and fast starting speed. However, the gas turbine must be transported back to the manufacturer for maintenance after a period of operation, so more spare parts are required, and workers are required to have high technical quality.

3、燃气——蒸汽联合循环发电技术（CCPP）

3. Gas-steam combined cycle power generation technology (CCPP)

该技术的基本原理是将剩余的焦炉煤气和回收的高炉煤气经净化、混合、加压后送往燃气轮机燃烧、膨胀做功，带动燃气轮发电机组发电。同时燃气轮机排放的高温烟气加热余热锅炉，产生蒸汽，带动蒸汽轮发电机组，形成联合循环发电。燃气——蒸汽联合发电是热能资源的梯级综合利用，其发电效率高达45％以上，实现了钢电联产，目前我国的济钢、宝钢、太钢、沙钢、通钢、鞍钢、马钢、邯钢安钢、涟钢等多家钢厂都在使用该技术。

The basic principle of this technology is to purify, mix and pressurize the remaining coke oven gas and the recovered blast furnace gas, and then send them to the gas turbine for combustion and expansion to work, so as to drive the gas turbine generator unit to generate electricity. At the same time, the high temperature flue gas discharged by the gas turbine heats the waste heat boiler to generate steam, which drives the steam turbine generator unit to form combined cycle power generation. Gas-steam combined power generation is an efficient cascade comprehensive utilization of thermal energy resources. Its power generation efficiency is up to 45%. It has achieved the combined production of steel and electricity. At present, many steel plants in China, such as Jigang, Baosteel, Taigang, Shagang, Tonggang, Ansteel, Maanshan Steel, Hangang Angang, Liangang, are using this technology.

4、用煤气内燃机带动发电机发电

4. Use gas internal combustion engine to drive generator to generate electricity

我国山东、山西、宁夏、安微、河北、新疆、内蒙古、云南、江苏等地的一些焦化厂采用煤气内燃机发电。可供选择的焦炉煤气内燃机发电机组有400千瓦、500千瓦、1200千瓦和2000年瓦。目前焦化行业大多采用的是500千瓦焦炉煤气内燃机发电机组。按焦炉煤气热值（低热值）16720千焦/立方米计算，1立方米焦炉煤气可发电1.1千瓦时。

Some coking plants in Shandong, Shanxi, Ningxia, Anwei, Hebei, Xinjiang, Inner Mongolia, Yunnan, Jiangsu and other places in China use gas internal combustion engines to generate electricity. There are 400 kW, 500 kW, 1200 kW and 2000 kW of coke oven gas internal combustion engine generator sets available. At present, most of the coking industry uses 500 kW coke oven gas internal combustion engine generator sets. Based on the calorific value of coke oven gas (low calorific value) 16720 kJ/m3, 1 cubic meter of coke oven gas can generate 1.1 kWh.