A brief analysis of the piping for ash polymerized powder gasification
Thread Content
Author/Source: Yan Fei (Hualu Engineering Technology Co., Ltd., Xi’an 710054) Date: 2007-3-21 1 Introduction Coal gasification is one of the main methods for cleaning and efficiently utilizing coal. China possesses abundant coal resources that are widely distributed across the country; in particular, coal in Inner Mongolia, northern Shaanxi, and Shanxi is inexpensive and of high quality, making it an excellent alternative to oil as a raw material for urban gas supply, feed gas for chemical synthesis, and gas for advanced combined-cycle power generation. Therefore, it is of great value to carry out research, development, and application of coal gasification. The coal slurry gasification technology, which is widely used today, and pressurized gasification technology are mostly applied in large ammonia synthesis plants or power plants. For many small and medium-sized nitrogen fertilizer manufacturers, it is economically feasible to adopt ash-melting fluidized bed pulverized coal gasification technology for local transformation of raw materials. Ash fusion technology is a clean coal gasification technique independently developed in China. Its main process flow consists of five stages: coal preparation, gas supply, gasification, dust removal, and waste heat recovery. What sets this technology apart is that the coal preparation stage involves two steps – crushing and drying; there is no need to pre-break down the cohesion of the coal. The crushed coal is then screened, and the coal particles smaller than 6 mm are sent to a rotary dryer for drying in order to reduce their moisture content
The piping systems for normal-pressure ash fusion in urbanization projects in Shaanxi have been altered a great deal; the information provided by the poster is somewhat outdated. I believe the most crucial issue is how to address the thermal expansion of equipment and pipelines, a problem that has caused significant difficulties for various manufacturers in this field. I hope the original poster can provide relevant information.
Thank you! Sharing great materials!
You can go to Fengxi and see how they handle it. There seem to be articles on this topic related to nitrogen fertilizers and methanol, in the March 2008 issue
Regarding the issues related to the 2nd floor, you can contact Jing Wenhua from Fengxi, Hu Chenhui and Zhao Gang from Taihua Shares, Yi Hailong from Shanxi Fertilizer Factory, Bian Sujun and Du Sanmin from Pingmei Feixing Group. They are all those who are directly involved in this project, and they serve as the project leaders for their respective factories.