The power generation efficiency of gas-fired internal combustion engine is usually between 30% and 40%, and the more common models can reach 35%. The most prominent advantage of gas-fired internal combustion engine is high power generation efficiency, followed by high equipment integration, fast installation, low requirements for dust in gas, basically no water, and the unit kilowatt cost of the equipment is relatively low. However, the internal combustion engine also has some shortcomings. First of all, when the internal combustion engine burns low calorific value fuel, the unit output drops obviously. A 500 kW gas-fired internal combustion generator set burning 8000 kcal / m3 natural gas fuel with low calorific value may drop to 350-400kw when using coking gas with low calorific value of 4000 kcal / m3.

此外，内燃机需要频繁更换机油和火花塞，消耗材料比较大，也影响到设备的可用性和可靠性两个主要设备利用指标，对设备利用率影响比较大，有时不得不采取增加发电机组台数的办法，来消除利用率低的影响。内燃机设备对焦化煤气中的水分子含量和硫化氢比较敏感，可能导致硫化氢和水形成硫酸腐蚀问题，需要采取一些必要措施加以克服。

In addition, the internal combustion engine needs to change the engine oil and spark plug frequently, and the consumption of materials is relatively large, which also affects the availability and reliability of the two main equipment utilization indexes, and has a greater impact on the equipment utilization rate. Sometimes, it is necessary to increase the number of generating units to eliminate the impact of low utilization rate. Internal combustion engine equipment is sensitive to water molecular content and hydrogen sulfide in coking gas, which may lead to sulfuric acid corrosion of hydrogen sulfide and water, and some necessary measures should be taken to overcome it.

燃气轮机比较适用于高含氢低热值和气体含杂质较多的劣质燃料，一些燃气轮机甚至使用原油和高硫渣油燃料。燃气轮机自身的发电效率不算很高，一般在30%～35%之间，但是产生的废热烟气温度高达450～550℃，可以通过余热锅炉再次回收热能转换蒸汽，驱动蒸汽轮机再发一次电，形成燃气轮机--蒸汽轮机联合循环发电，发电效率可以达到45%~50%，一些大型机组甚至可以超过55%。

Gas turbine is more suitable for the inferior fuel with high hydrogen content and low calorific value and gas containing more impurities. Some gas turbines even use crude oil and high sulfur residue fuel. The power generation efficiency of gas turbine itself is not very high, generally between 30% and 35%, but the temperature of waste heat flue gas generated is as high as 450 ~ 550 ℃, which can be recycled by waste heat boiler to convert steam, drive steam turbine to generate electricity again, and form gas turbine steam turbine combined cycle power generation. The power generation efficiency can reach 45% ~ 50%, and some large units can even exceed 55% 。

采用燃气轮机的优势相对比较多，首先是设备的可用性和可靠性都比较高，综合利用率一般可以保持在90%;其次，对于燃料的适应性比较强，含硫、含尘高一点问题都不大;再有就是发电出力一般不会减少，甚至因为燃料进气量增加而有所增加;此外，燃气轮机功率密度大体积小，比较适合再移动，便于转移运行现场，这对于存在一些不确定性的焦化厂项目的焦化煤气利用非常有利。但是，世上的事务有一利，必有一弊，没有十全十美的事情。

The advantages of using gas turbine are relatively more. Firstly, the availability and reliability of the equipment are relatively high, and the comprehensive utilization rate can generally be maintained at 90%; secondly, the adaptability of fuel is relatively strong, and the problems of high sulfur content and dust content are not obvious; thirdly, the power generation output will not decrease in general, even increased due to the increase of fuel intake; In addition, the gas turbine has large power density and small volume, which is suitable for re moving and easy to transfer the operation site, which is very beneficial to the utilization of coking gas in coking plant projects with some uncertainties. However, the affairs of the world have one advantage and one disadvantage. There is no perfect thing.

燃气轮机进气压力比较大，越是发电效率高的机组燃料进气压力越高，因为焦化煤气本身没有什么压力，这就需要使用燃气压缩机，压缩燃气需要消耗大量的能量，影响到设备的实际输出功率，一些项目甚至需要消耗燃气轮机15%~20%的功率，对于联合循环项目达到影响可能是10%~15%的输出功率;采用联合循环系统存在与蒸汽轮机相同的水资源条件要求，系统比较复杂，投资也比较大，同时搬迁也比较困难。

The inlet pressure of gas turbine is relatively large, and the higher the unit with high power generation efficiency, the higher the fuel inlet pressure. Because coking gas itself has no pressure, it needs to use gas compressor. Compressing gas needs to consume a lot of energy, which affects the actual output power of the equipment. Some projects even need to consume 15% ~ 20% of the power of the gas turbine, which has an impact on the combined cycle project The impact may be 10% - 15% of the output power; the combined cycle system has the same water resource requirements as the steam turbine, which is more complex, more investment, and more difficult to relocate.

关于焦化发电机组http://www.huannengpower.com就先介绍到这里了，相信大家在实际的工作中会用到相关知识，如果您有这方面的需要，欢迎前来选购。

About coking generator set http://www.huannengpower.com First of all, I believe that you will use the relevant knowledge in the actual work, if you have the need in this respect, welcome to buy.