Engineering Design for 4 million tons/year Lignite Upgrading Project ----- Tendering

The 4 million tons per year lignite upgrading project is by no means a small project; then why seek out small and medium-sized chemical engineering design firms? Moreover, although the downstream products resulting from lignite upgrading vary, the choice of process technologies remains largely the same. I hope Banzhu can check this out or provide more details on it

There are several routes for upgrading lignite to a higher quality level. Could you explain which route is used?

Could that company talk about lignite upgrading? Let’s learn about it together*.

Lignite is the type of coal with the lowest degree of coalification. Lignite has a high moisture content (30%–50%), a high volatile matter content (15%–30%), and low calorific value. It is prone to weathering and fragmentation, as well as oxidation and spontaneous combustion; therefore, it is not suitable for long-distance transportation (usually within a range of 300 kilometers) or utilization. Additionally, its direct combustion generates large amounts of dust, causes severe environmental pollution, and results in low heat efficiency, all of which limit its application significantly. The cost of upgrading one ton of lignite is about 40 yuan, while the upgraded lignite can be sold for 60 to 70 yuan more per ton.

Question: Does 4 million tons refer to raw coal or processed coal?

Who knows what the process route for gas-based heat carriers is~~~ Someone who understands the issues related to lignite upgrading is needed to provide an answer

The application of low-temperature coal pyrolysis technology began in the 19th century, when it was primarily used to produce kerosene and wax. At the end of the 19th century, its use declined due to the invention of the electric light. On the eve of and during World War II, Nazi Germany built large-scale low-temperature carbonization plants for military purposes, to produce coal tar from low-temperature carbonization, which was then converted into gasoline and diesel through high-pressure hydrogenation. After the war, the extraction of large quantities of cheap oil caused the coal low-temperature carbonization industry to stagnate once again, with various new methods of low-temperature carbonization remaining in the experimental stage. Many low-temperature dry distillation methods have existed throughout history, but only a few have been successful on an industrial scale. These methods can be classified into external heating, internal heating, and combined internal and external heating types according to the heating method of the furnace.

Could you get in touch with me regarding your lignite upgrading project?

As far as I know, improving the quality of lignite or carrying out dry distillation is currently seen as an attractive option by many large companies such as Datang, Shenhua, and China Power Investment; however, these initiatives have not yet been implemented on a large scale. At present, the focus is mainly on acquiring resources, with good technologies still under development... A project for improving the quality of lignite at a rate of 4 million tons per year is indeed a very large-scale undertaking, and it is recommended to seek help from a **-level chemical engineering design institute for its design