【Major Chemical Equipment】094 – China’s Largest New-Type Vertical Waste Heat Boiler

Lanshi Plant’s manufacturing capacity for petrochemical equipment was once among the best in China.

Is Lanshi Heavy Equipment still a subsidiary of CNPC?

I’m not really sure anymore, but a few years ago Lanchi Heavy Industry acquired Luoyang’s Ruize Engineering Company, which enhanced its capabilities in process design. The changes within CNPC over these past ten-odd years have been extremely complex.

What does Ruize Engineering Company do? ? ?

This post was last edited by qugd on 2022-4-13 08:36. Rize was originally a private engineering company based in Luoyang; its key technical staff came from Luoyang Institute. The company was involved in the design and overall project management for oil refining and chemical industry projects. A few years ago, Lanshi Heavy Industry acquired this private engineering company, presumably in order to strengthen its capabilities in process engineering design within the petrochemical sector. The boss of Ruize is named Ma Xiao; he graduated from the Chemistry Department of Lanzhou University in 1982, is from Henan Province, and has worked at LPEC in Luoyang for over 20 years, focusing on petrochemical process design and project management.

The boiler has a diameter of 3800 millimeters and a height of 39200 millimeters, and is composed of four parts: Fire Tube Furnace I, Superheater, Fire Tube Furnace II, and Economizer. Ruize Petrochemical, a subsidiary of Lanshi Heavy Equipment, is responsible for the engineering design, while Lanshi Heavy Equipment handles the EPC overall management and the manufacturing of key equipment, utilizing the circulating fluidized bed pressurized gasification process technology provided by Lanshi Research Institute. 　　According to Kim Yu, the head of the company’s thermal engineering department, the entire process involves using the high-temperature gas at 950°C resulting from the reactions in the front-end gasification furnace; this gas is then passed through a waste heat boiler to produce medium-pressure superheated steam at 450°C. At the same time, the high-temperature gas is cooled to around 200°C before being fed into subsequent processes. Furthermore, this unit is the vertical water/fire tube combined waste heat boiler with the highest processing capacity in China at present; several boilers commonly used in the industry, each with a capacity of 30,000 standard cubic meters per hour, would be needed to achieve the same performance. 　　“The most challenging parts of the entire project design are Fire Tube Furnace I and Fire Tube Furnace II, both of which are vertical flexible thin-wall tube sheet waste heat boilers. In particular, gas accumulation is likely to occur in the flow dead zones of the upper tube sheet, leading to equipment over-temperature damage. Leveraging years of accumulated design experience, the company’s R&D team solved this problem through simulation and by adopting a new patented structure. At the same time, a comprehensive optimized design was carried out for the equipment to ensure that the device meets the design requirements under various load conditions. ”Jinyu said. 　　It is understood that this equipment was manufactured by the Thermal Energy Engineering Division of Lansi Heavy Equipment. The department’s team consists of professionals in fields such as chemical engineering processes, chemical machinery, and thermal energy engineering, who are skilled in heat transfer calculations, fluid dynamics analysis, and stress analysis design. They possess extensive design experience with various types of high-temperature and high-pressure waste heat boilers. They conducted extensive analysis and calculations on the project; ultimately, through fluid dynamics analysis, they resolved the issue of excessive temperature in the top tube sheet caused by flow dead zones, which led to equipment damage. They also completed the stress analysis and design for the flexible thin tube sheet, as well as the structural design of the entire equipment. It not only ensures that the device meets the design requirements under various loads, but also lays the foundation for the enlargement of this type of equipment. 　　Additionally, the conversion waste heat boiler of the POX unit designed by this division previously had an operating temperature of 1300°C, an operating pressure of 5.0 MPa, and an H2 content of 60%; it was the waste heat boiler with the most stringent operating conditions in China, and has been operating stably in a methanol production plant using coke oven gas at a certain factory for 5 years. The core structure of the equipment has been granted a **patent**, and it has been used in multiple first-of-their-kind installations in China. The waste heat boiler designed this time is an enlarged version of this design, enabling the industrialization of large-scale domestic coal-to-hydrogen plants.

More people are welcome to participate in the relevant discussions. Click on the blue link to access it: The 【HaiChuan Equipment Guessing Game】 series is being updated continuously in 2022; all Hai friends are invited to join actively! https://bbs.hcbbs.com/thread-2079686-1-1.html (Source: Huahai Chuanliu – Haichuan Chemical Industry Forum) Summary post on the series 【Major Equipment in the Chemical Equipment Industry】 https://bbs.hcbbs.com/thread-3312079-1-1.html (Source: Huahai Chuanliu – Haichuan Chemical Industry Forum) Summary post discussing the components of cracking furnace equipment for 【Ethylene Cracking】 https://bbs.hcbbs.com/thread-3308724-1-1.html (Source: Huahai Chuanliu – Haichuan Chemical Industry Forum)

On April 5, the waste heat boiler for the Panjin Haoye coal-to-hydrogen plant with a capacity of 200,000 standard cubic meters per hour, which was developed, designed, and manufactured by Lanshi Heavy Equipment, was completed and shipped. This is the vertical water/fire tube combined waste heat boiler with the largest processing capacity in China at present. This waste heat boiler is composed of fire-tube furnace I, superheater, fire-tube furnace II, and economizer. It is the vertical water/fire-tube combined waste heat boiler with the largest processing capacity in China at present. It represents another key piece of equipment, following the gasifier, in the pressurized circulating fluidized bed gasification process package promoted jointly by the Chinese Academy of Sciences and Lansi Research Institute – an equipment set in which this boiler is also one of the two core components. It is understood that the 200,000 standard cubic meters per hour coal-to-hydrogen plant built by Panjin Haoye was designed by Ruize Petrochemical, a subsidiary of Lansi Heavy Industry, while Lansi Heavy Industry was responsible for the EPC overall project management and the manufacturing of the core equipment; the technology for pressurized fluidized bed coal gasification was provided by Lansi Research Institute. This technology was jointly developed by Lansi Research Institute and the Institute of Engineering Thermophysics of the Chinese Academy of Sciences, and the first domestic demonstration unit of this technology has been put into use in the Lansi Gold Chemistry project. The application of Lansi’s coal-to-gas technology in the Panjin Haoye coal-to-hydrogen project represents an important step for Lansi Heavy Equipment in transitioning from traditional equipment manufacturing to providing comprehensive solution services. It lays a solid foundation for the replication and market promotion of circulating fluidized bed pressurized gasification technology, and will play a key role in advancing the development of technologies for the clean and efficient utilization of low-grade coal.

Lanshi Heavy Equipment’s Qingdao factory focuses on large-scale equipment; its Hami factory aims at the Northwest region