There are nearly 400 calcium carbide manufacturing enterprises in China at present whose total annual productivity exceeds 15 million tons. More than 15 billion m3 tail gas of calcium carbide furnace is produced in China every year. It mainly contains CO (75%~90%) which is total If fully discharged, equaling to the waste of 2.4 million tons of standard coal, and emits 12 million tons of CO2 and more than 900,000 tons of dust every year. It is the best way to save the energy, reduce the emission and transform the waste to treasure by reasonably utilizing CO.
Application of PSA-CO technology to the calcium carbide industry
Purification of CO by the PSA-CO technology may obtain the 99% high-purity CO and synthesize the high value-added chemical products, such as MEG, methyl carbonate, acetic acid, methanol, TDI and DMF.
More than 75% of the tail gas of calcium carbide furnace is CO. Purification of CO by the PSA technology and synthesis of the high value-added chemical product such as MEG largely reduce the raw material cost of the high-purity CO. The new-type purification device of PIONEER not only utilizes the high value-added tail gas of calcium carbide furnace but also gives a new idea for the development of the technology of synthesis gas-to-MEG.
Xinjiang Tianye Group adopts the unique PSA technology of PIONEER to separate the high-purity CO from the tail gas of calcium carbide furnace to synthesize MEG. As the first industrial device synthesizing MEG by the tail gas of calcium carbide furnace in China, it completely solves the problem of tail gas reclamation. Besides, it not only promotes the emission reduction but also largely reduces the raw material cost of high-purity CO which saves a lot gas generation expenses.