Thermal hydrogenation at Xinguang Silicon Industry

Haha, friend. We might have met before.

I heard that an explosion occurred in the hydrogenation furnace at the OP’s place. Could you tell me what happened?

That might be a rumor you’ve heard; Sinoguang has always done an excellent job in terms of safety and environmental protection

Old Pu. . . . . . . . . . . . . . .

Has Sinoglow’s cost decreased again? A year and a half ago, your chief engineer from Xinguang also came to our laboratory to inquire about the progress of our experiments on the hydrogenation of silicon tetrachloride

Xinguang Silicon Industry has made a significant breakthrough in the thermal hydrogenation technology of silicon tetrachloride. The importance of this technology lies in the fact that it represents a key technique used by leading international companies to improve the production processes based on the modified Siemens method; without mastering this technology, one cannot truly say that they have mastered the modified Siemens method. In the process of polysilicon production, approximately 15 tons of silicon tetrachloride are generated for every ton of polysilicon produced, and whether this silicon tetrachloride can be effectively converted and utilized is directly related to the ability of the entire production line to operate at full capacity continuously. One of the main reasons why enterprises already in operation in China are unable to operate at full capacity or have to shut down is their struggle with the handling of silicon tetrachloride; whether silicon tetrachloride can be transformed and utilized is directly related to energy conservation and emission reduction, cost reduction, and a sustainable circular economy. During the project construction, Xinguang Silicon Industry Company originally used silicon tetrachloride thermohydrogenation technology equipment provided by Russia. This device is used in 1,000-ton polysilicon production lines, and it is also the first time for the Russian side to use it. Pilot operation tests have shown that the Russian-designed equipment has serious defects in terms of material selection and chassis structure design; as a result, the equipment is unable to achieve the designed values for gas flow rate during operation, and it cannot function stably and continuously. The conversion rate of silicon tetrachloride is only around 12-13%, which is **lower than the 18% conversion rate promised by the Russians**. Moreover, material leaks occur from time to time, posing significant safety and environmental hazards. Under the strong leadership of the company’s technical expert team, the engineering and technical staff broke free from conventional thinking, emphasized scientific approaches, were brave in innovation, and took bold actions; they selected new materials for the equipment and redesigned its core component—the chassis. Through nearly two months of trial operation, the redesigned and modified unit demonstrated better performance in terms of operational efficiency and gas flow rate compared to the design specifications of the original Russian unit; the conversion rate of silicon tetrachloride reached 20–23%, exceeding the Russian unit’s designed value of 18%. Approximately 600 tons of trichlorosilane can be produced each month, which is sufficient for the synthesis of polysilicon. This reduces the cost of purchased raw materials by around 10 million yuan, and it also cuts the costs associated with transporting silicon tetrachloride by about 2 million yuan. This ensured the continuous and normal operation of production; the monthly output of polysilicon exceeded 80 tons in September, and reached a peak of 87 tons in October. At the same time, it **reduced the company’s environmental pressure**. As of November 13, a total of 711 tons of polysilicon have been produced, and the goal of producing 800 tons of polysilicon throughout the year is on track to be achieved, which also creates the conditions for raising production levels even further next year. The significant breakthrough achieved by Xinguang Silicon Industry in the technology of thermal hydrogenation of silicon tetrachloride marks it as the first company in China to master this core technology. This further demonstrates the company’s strength in technological innovation, allowing it to take the lead in this field and enhancing its competitiveness in the market. Since the construction and commissioning of the project, Xinguang Silicon Industry has adopted and integrated relevant advanced technologies from home and abroad, enabling the project to be completed four months ahead of schedule. On the premise of ensuring safety and environmental protection, a successful trial run with a single batch of material feeding led to the production of qualified products. Moreover, by being bold in exploration in practice, six proprietary technologies were developed (pressurized synthesis technology, wet nitrogen boron removal technology, wet hydrogen impurity removal technology, thermal hydrogenation technology, comprehensive thermal energy utilization technology, reduced exhaust gas recovery technology, and product sorting and inspection technology). This is an important factor that enables Xinguang Silicon Industry to attract attention from its international peers, earn respect from domestic competitors, and hold a leading position. 1. Focus on platform development. It is necessary to make good use of the fact that the company has been designated as a Polysilicon Engineering Technology Center in Sichuan Province, to further clarify the key areas for technological innovation. Improving and optimizing techniques such as distillation and purification, increasing the deposition rate of polysilicon, reducing energy consumption during reduction processes, carrying out thermal hydrogenation of silicon tetrachloride, recycling exhaust gases from reduction reactions, making comprehensive use of thermal energy, and improving the quality control of polysilicon – along with the localization of imported equipment – should be identified as the main priorities for the company’s technological innovation in the next two years. 2. Strengthen collaboration. Strengthen cooperation with institutions of higher learning and research and design organizations such as Sichuan University and the 11th Electronics Research Institute, leverage their respective strengths to achieve a powerful alliance, integrate technological innovation resources, and establish an integrated technology innovation system that combines industry, academia, and research in order to accelerate the pace of technological innovation. 3. Make good use of strategies. First, ensure the timely completion of the 5 research projects assigned by the Ministry of Science and Technology, the Provincial Department of Science and Technology, and the Provincial Economic Commission. Demonstrate capabilities and build a positive image in order to secure more policy support at all levels for the company’s technological innovation. Secondly, it is necessary to study and make good use of the various policies outlined in Document No. 23 issued by the Sichuan Provincial People’s Government, namely the funding policies, tax policies, policies for the transformation of research results, and incentive measures. 4. Protect one’s interests well. Make serious efforts in filing patent applications for our own technologies and further strengthen the internal system for protecting technical secrets. Rely on laws and regulations to protect technological achievements, and use market principles to enable them to generate greater benefits for shareholders. 5. It is necessary to continue to intensify efforts to apply for the **Polysilicon Engineering Laboratory**, as well as to make advance preparations for applying to establish a **national-level Polysilicon Technology Engineering Center**. In terms of technological innovation, the approach of \"conducting preliminary research on a batch, putting it into use in a batch, and keeping another batch in reserve\" reflects the goal of \"being the best in China and achieving world-class standards.\" Author: Tianwei Ren Xiaogu 11/29/2008 9:47:40 AM

Looking forward to it... Please, if possible, the original poster can also share the patent so that we can all benefit from it!

The development of new processes cannot be completed in a short period of time, and it requires significant resources and manpower; ordinary companies will not undertake such tasks. This is why we remain at the mercy of others. Since Sinoguang has started to do this, it’s a step forward and something worth looking forward to; I hope it will be successful.

The poster seems to be New Light’s spokesperson

Like it. . I hope to maintain my advantages