The coking process produces a large amount of coke oven gas, usually directly burned, or gas purification to extract gas, tar, etc. With the improvement of small gas turbine technology and cost reduction, the use of small gas turbine + waste heat power generation this more and more efficient and environmentally friendly way is more and more accepted by coke enterprises, with the popularity of waste heat power generation, 6B and below all kinds of small gas turbine waste heat boiler has become a research hotspot of enterprises, product parameter settings from single pressure to double pressure, three pressure, etc., the circulation mode has two types of natural circulation and forced circulation, at the same time, the heating surface layout can choose vertical and horizontal layout, using modular design, corresponding to different specifications of small gas turbines, Realize the serialization of boiler design.